Title: The Skeletal System
1The Skeletal System
- Chapter 7
- http//highered.mcgraw-hill.com/sites/0072919329/s
tudent_view0/
2Overview of Chapter 7(Part I)
- Topic Pgs.
- Bone Structure/Classification 193-194
- Compact vs. Spongy Bone 195
- Growth, Development, Homeostatsis 195-201
- Function of Bone Fractures 202-203
- Organization of the Skeleton 205-208 (axial
and appendicular) - ----------------------------Quiz------------------
--------------------
3Overview of Chapter 7(Part II)
- Topic Pgs.
- Cranium (skull) 209-218
- Vertebral Column (backbones) 219-224
- Thoracic Cage 225-228
- Upper Limbs Shoulder 229-232
- Pelvic Bones 233-236
- Lower Limbs Hip 236-241
- --------------------------------------------------
--------------------- - Practicum on entire Skeleton
- Written Test
4Introductory Questions 1
- Name the region where some of the oldest known
human skeletons have been found? How many
skulls were found. What other organisms were
found in the fossil bed? - How are bones classified? Name these groups and
give an example of a bone that belongs to each
group. - How does the epiphysis differ from the diaphysis?
- What is the periosteum composed of and where is
it located? What is this structure usually for? - What is the difference between compact bone and
spongy bone?
5Classification of Bones (pg. 194)
6Microscopic View of Bone
- Structures/Features to note
- Endosteum
- Osteonic canal (runs up down) Haversian canal
- Perforating canal (runs across) Volkmanns canal
- Canaliculus
- Lacuna (space)
- Trabeculae (spongy bone)
- Osteon
- Periosteum
7Internal Anatomy of a Long Bone
Pg. 194
8Introductory Questions 2
- What is the range of terms (prefixes) for this
week? Write the 1st and 20th term that we need
to know for the week. - What is the main function of Bone?
- How is a Haversian Canal different from a Volkman
canal? - Give (2) differences between endochondral bone
growth and Intramembranous bone growth. - (See table 7.1 on pg 192)
- 5) How are osteoclasts different from
osteoblasts?
9Compact Bone vs. Spongy Bone
Pg. 190
10Haversion Volkmann Canals
11Function of Bone
- Shape, support, and protect body structures
- Houses tissue and produces important blood cells
Erythrocytes and Leukocytes - RBC produced in spongy Bone (Hematopoiesis)
- Stores inorganic salts
- Stores Fat (yellow bone marrow)
- Acts as levers (3 classes)
12Two Ways that Bone Develops
- Intramembranous sheet-like layers of connective
tissue is replaced by bone - Fetal development Skull Bones
- Endochondral hyaline cartilage is replaced by
bone - Most of our bones develop this way
- Involves ossification centers Epiphyseal growth
areas
13Intramembranous Bone Growth (Pg. 197)
- Begins as layers of connective tissue
- Connective tissue ? Osteoblasts
- (differentiates)
- Osteoblasts ? Osteocytes
- Osteocytes ? Spongy bone Compact Bone
- Common sites Skull (cranial) bones
14Intra-Membranous Growth in Fetal Skeleton
Pg. 197
15Endochondral Bone Growth (pg. 198)
- Most Bones of Skeleton from this way
- Forms from masses of hyaline cartilage
- Long Bones have ossification centers
- -Primary center of the diaphysis
- -Secondary in the epiphyses
- Epiphyseal disk band of cartilage (4 layers of
cells) between the primary and secondary
ossification centers (see fig. 9 on pg. 199)
16Endochondral Bone Growth
17Endochondral Bone Growth
Pg. 199
18High Magnification of Epiphyseal Plate (pg. 199)
19Osteon Development for Bone Thickening
20Composition of Bone (pg. 204)
- Inorganic Material 67
- Calcium 39
- Phosphate 17
- Carbonate 9
- Na, Mg, K 2
- Organic Material 33
- Collagen 29
- Proteoglycan 2
- Lipids, Peptides 2
- Proteins
21Deficiencies in Organic and Inorganic Substances
- Lack of Inorganic salts
- Bones become Flexible or Rubbery
- Lack of Organic Material
- Bones become Brittle and Weak
22Factors Influencing Bone Development
- Vitamin D Helps the body to absorb calcium
- Uncommon in natural foods
- Deficiencies cause rickets osteomalacia
- Vitamin A Helps to Reabsorb bone during
Development - Stimulates Osteoclast activity
- Vitamin C Helps collagen to be synthesize
- Bones can become too slender and fragile
- Growth Hormone Stimulates chondrocytes to ossify
at the epiphyseal disks
23Other Factors that Influence Bone Growth (pg. 201)
- Thyroid hormones replaces cartilage in the
epiphyseal disks - Male Female sex hormones promotes bone tissue
to grow (ossification). Estrogen seems to have a
stronger effect compared to androgens. - Physical stress Movement causes hypertrophy or
thickening of bone tissue vs. a lack of exercise
that causes atrophy.
24Video How a Bone Heals Itself
- Breaking Down
- Write 15 Key Numbered Statements from the video
25Introductory Questions 3
- 1) List (3) factors that can affect bone
growth. (pgs. 194-196). - 2) What causes rickets to occur? Name some of
the symptoms observed with individuals suffering
from rickets. Read about the unusual form of
rickets on pg. 195 and name three major problems
the two sisters faced. Why was this form of
rickets unusual? - 3) List the six major types of fractures. Which
one do you think is the most difficult to fix or
set? - 4) Name the four parts of a lever system. How
does a second class lever differ from a 3rd class
lever? Draw these two types of levers. (see pg.
200) - How many total bones make up the skull from the
206 total bones? - Describe and explain what Acromegaly is.
- Look at pg. 202 fig. 7.15 and name the two
hormones released by the thyroid gland and
parathyroid gland that regulates the resorption
and deposition of bone tissue by the osteoblasts
and osteoclasts.
26Homeostasis of Bone Tissue
- Involves two types of cells
- Osteoblasts replaces, deposits bone tissue
- Osteoclasts breaks down bone tissue by secreting
an acid. - Remodels the bone throughout life
- Opposing forces (resorption deposition)
- Maintains a constant mass
- 3 to 5 of bone calcium is replaced yearly
27Common Fractures of Bones
- Greenstick
- Fissured
- Communited
- Transverse
- Oblique
- Spiral
- (See Pages 198 199)
28Pg. 198
29Repair Healing of Fractures
- Blood vessels are broke Hematoma Develops
- Osteoblasts invade the area
- New blood vessels form
- Spongy Bone begins to develop
- Granulation tissue develops (fibrocartilage
forms) - WBCs remove blood clots, dead damaged cells
- Bony callus replaces Fibrocartilage bone fills
the area - Osteoclasts remove excess bone-restoring bone
shape
30Fracture Repair of Bone (Part 1)
31Fracture Repair of Bone (Part 2)
32Key Factors that Affect Bone Growth Development
- Diet Minerals, salts, protein
- Vitamins A, D, C
- Hormones Growth, Estrogen, Testosterone
- Thyroid Parathyroid gland (feedback system)-pg.
202 - Low calcium causes parathyroid to release its
hormones increasing activity of the osteoclasts
to resorb (break down bone) - High calcium causes thyroid gland to release
calcitonin increasing activity of the osteoblasts
to deposit bone. - Physical Exercise
33Ossification Timetable (Pg. 194)
- 3rd month (prenatal) Long bones
- 4th month (prenatal) 1? Ossification centers
appear - (Diaphyses)
- Birth - 5 yrs 2 ? Ossification centers appear
- (Epiphyses)
- 5 12 yrs Many bones are ossifying
- 17 20 yrs Upper limbs Scapulae ossify
- 18 23 yrs Lower limbs coxal bones ossify
- 23 25 yrs Sternum, Clavicles, and vertebrae
ossify - 25 yrs beyond Nearly all bones have completely
ossified
34Bones as Levers
35Bones as First Third Class Levers
36Examples of the Three Classes of Levers
37Levers Systems in the Upper Arm
38Topics Discussed to Far (Review)
- Classification of Bone - according to (4) shapes
- Spongy Bone vs Compact Bone
- Key Terms
- -Endosteum -Osteonic canal (runs up down)
- -Canaliculus -Perforating canal (runs across)
- -Lacuna (space) -Trabeculae (spongy bone)
- -Osteon -Periosteum
- -Diaphysis -Epiphysis
- -Medullary Canal
- Endochondral vs. Intramembranous Bone Growth
- Composition of Bone Inorganic (67) Organic
(33) - -Calcium Phosphorus (56) and Collagen (29)
- Six major fractures how fractures repair
themselves (2 cell types) - Factors that affect bone growth (vitamins,
hormones, physical activity) - Bones acting as Levers (three classes)-Pg. 200
- Key terms to describe skeletal structures (pg.
206) -
39Introductory Questions 3
- 1) List (3) factors that can affect bone
growth. (pgs. 194-196). - 2) What causes rickets to occur? Name some of
the symptoms observed with individuals suffering
from rickets. Read about the unusual form of
rickets on pg. 195 and name three major problems
the two sisters faced. Why was this form of
rickets unusual? - 2) List the six major types of fractures.
Which one do you think is the most difficult to
fix or set? - 3) Name the four parts of a lever system. How
does a second class lever differ from a 3rd class
lever? Draw these two types of levers. (see pg.
200) - How many total bones make up the skull from the
206 total bones? - Describe and explain what Acromegaly is.
- Look at pg. 202 fig. 7.15 and name the two
hormones released by the thyroid gland and
parathyroid gland that regulates the resorption
and deposition of bone tissue by the osteoblasts
and osteoclasts.
40Introductory Questions 4
- 1) Using the table on Pg 206, define each of the
following skeletal structures - condyle foramen fossa
- fovea meatus facet
- ramus sinus suture
- tuberosity linea fontanel
41Underside View of the Skull
42The Atlas (C-1) Axis (C-2)
43The Scapulae
44The Humerus
45Radius and Ulna
46Femur, Tibia, and Fibula
47Axial vs. Appendicular
- Axial Skeleton
- Skull
- Hyoid Bone
- Vertebral Column
- Thorax
- Appendicular Skeleton
- Pectoral Girdle (shoulder)
- Upper Limbs
- Pelvic Girdle
- Lower Limbs
- http//www.wisc-online.com/objects/index_tj.asp?ob
jidAP13404 -
48Bones of the Skull (Axial)http//www.charletta.co
m/skullbase3d.swf
- Cranial Facial Miscellaneous
- Frontal Maxilla (2) Mandible
- Parietal (2) Palatine (2) Ossicles
(6) - Occipital Zygomatic (2) malleus
- Temporal (2) Lacrimal (2)
incus - Sphenoid Nasal (2) stapes
- Ethmoid Vomer Hyoid
- Inferior Nasal Concha (2)
- ________ _______________________
__________ - 8 13 8
- Total Bones Identified 29
49Sutures of the Skull
- Lambdoidal Parietal Occipital Bones
- Squamosal Parietal Temporal Bones
- Coronal Frontal Parietal Bones
- Sphenosquamosal
- Sphenofrontal
- Parietomastoid
- Nasomaxillilary
- Zygomaticomaxillary
50Suture Lines of the Skull
51Key Bones with Many Features
- Temporal Bone
- external auditory meatus mandibular fossa
- mastoid process styloid process
- carotid canal jugular foramen
- Occipital Bone
- foramen magnum occipital condyles
- Sphenoid Bone
- sella turcica sphenoidal sinus
- optic canal foramen rotundum
- foramen ovale foramen spinosum
- foramen lacerum
52Key Bones with Many Features
- Mandible
- mental foramen mandibular foramen
- coronoid process mandibular condyle
- ramus
53Introductory Questions 5
- 1) Match the following
- Foramen A. a cleft or groove
- Tuberacle B. a rounded process-articulates in
a joint - Facet C. an opening for blood vessels
nerves - Condyle D. a tiny pit or depression
- Fovea E. a small, knoblike process
- Fissure F. small, nearly flat surface
- 2) How many bones are found in the human skull?
How many are facial bones? How many form the
cranium? - 3) Which facial bone is considered to be the
keystone of the face? - 4) How many sutures are there? Name them.
- 5) Which bone has the styloid process, a mastoid
process, and a mandibular fossa? - Which bone has a coronoid process and a mental
foramen? - 6) The cheek bone is composed of two bones. Name
these two bones. - 7) What function does the hyoid bone serve?
-
54Frontal View of Skull
55Top View Looking into the Skull
56Underside View of the Skull
57Sagittal View Looking at the Side
58Coronal Cut Looking at Anterior Surface of the
Face
59Underside View of the Skull
60Introductory Questions 6
- How does the axial skeleton differ from the
appendicular skeleton? - Which class of lever is Fulcrum Effort -
Resistance - Match each feature with the correct bone on the
right. - Coronoid process A. Temporal
- Supraorbital foramen B. Sphenoid
- Foramen magnum C. Frontal
- Mandibular fossa D. Mandible
- Sella turcica E. Ethmoid
- Cribriform plates F. Occipital
- 4) Name the suture line that borders the edges of
the parietal and occipital bones.
61Lab Activity-Exploration of the Skull
- Locate and Identify each feature and which bones
they are found in or associated with (2 bones
per Quest) - Mental foramen Foramen Spinosum
- b. Supraorbital foramen Foramen Lacerum
- c. External auditory meatus Carotid canal
- d. Sella turcica Jugular foramen
- Styloid process Optic canal
- Mental foramen Foramen ovale
- Magnum foramen Cribiform plate
- Mandibular fossa Coronoid process
62Introductory Questions 7
- Which of the following bone(s) do not have right
and left aspects? - temporal maxilla inferior nasal
concha - vomer sphenoid parietal
- lacrimal malleus ethmoid
- Palatine hyoid occipital
- 2) Which is the only movable bone in the
face? - Which bone in the skull has the most passageways
running through it? Name this bone and all of
the passageways. - Match each fontanel with the correct time it
closes - Mastoid A. middle or end of the second year
- Frontal (metoptic) B. 2 months after birth
- Sphenoid C. 3 months after birth
- Anterior D. end of the first year
- Posterior E. before the sixth year can
remain open
63Infantile Skull Fontanel Closing
- Posterior 2 months after birth
- Sphenoid 3 months after birth
- Mastoid end of the first year
- Anterior Middle or end of the second year
- Frontal before the sixth year can remain open
- (metoptic)
64Infant Skull Features (Top View)
65Side View of Infant Skull
66(No Transcript)
67Infantile Skull Fontanel Closing
- Posterior 2 months after birth
- Sphenoid 3 months after birth
- Mastoid end of the first year
- Anterior Middle or end of the second year
- Frontal before the sixth year can remain open
- (metoptic)
68Introductory Questions 8
- Name the 1st and 20th term for this weeks vocab.
quiz - Name the tissue that separates each vertebral
bone in the spine. - Give three basic functions of the spine.
- Out of the 33 bones found in an infants vertebral
column, how many fuse to form the sacrum and
coccyx? When the child becomes an adult, they
will have bones in their vertebral column. - Name the four basic curvatures of the vertebral
column. - Which section contains the most vertebral bones?
How many are there? - How does the Atlas differ from the Axis? Which
one is C1?
69Bones of the Vertebral Column
- Cervical Thoracic Lumbar Sacrum Coccyx
- 7 12 5 1 1
- C-1 Atlas
- C-2 Axis
- 5 others
- Total Bones in Vertebral Column 26
- Bone Talley Skull 29
- Spine 26
- Total 55
70Key Structures on the Vertebral Bones
- Body
- Transverse Process
- Pedicles
- Facets
- Spinous process
- Articulating Facets
71Features of a Typical of a Vertebral Bone
72The Atlas (C-1) Axis (C-2)
73The Sacrum (5 fused bones) Coccyx (4 fused
bones)
74Key Structures of the Sacrum
- Median Sacral Crest (posterior view)
- Sacral Promontory (1st sacral vertebra)
- Sacral Canal
- Pelvic Sacral Foramina (8)
- Auricular surface (Sacroiliac joint-articulates
with the coxal bones in the pelvis) - Sacral Hiatus (The last sacral vertebra is not
fused.)
75The Thoracic Cage
- Sternum Manubrium, Body, and Xiphoid Process
- Total of 12 pairs of ribs 24 ribs (True
False ribs) - True Ribs First 7 pairs of ribs are attached to
the sternum - False Ribs 5 pairs that are not attached to the
sternum - Floating Ribs also called vertebral ribs
- - last one to three pairs of ribs has one end
not attached - Structures of a Typical rib
- -Shaft (slopes downward)
- -Head (posterior end)
- -Neck
- -Tubercle (articulates with the transverse
process of thoracic vertebra) - Costal Cartilage hyaline located with ribs
sternum
76Articulation of the Ribs with a Thoracic Vertebrae
77Introductory Questions 9
- Identify the first and 20th term for your weekly
vocabulary quiz. (Quiz 16) - Give the number of foramens that are present in
the sacrum. What goes through these openings? - 3) How many total ribs do humans have? How
many are true ribs and how many are false ribs? - 4) How is a true rib different from a false
rib? - 5) Name the three parts that make up the
sternum. - 6) Draw/sketch the sternum and a rib. Label
the three parts of the sternum and key features
on both ends of the rib. -
-
78The Vertebral Column
79Three Types of Vertebrae
80Thoracic Cage
81The Pectoral Girdle
82The Pectoral Girdle
- Composed of four bones
- -two clavicles two scapulae
- Incomplete ring (open in the back)
- Supports the upper limbs
- Many attachment sites for muscles
- Complex joint (shoulder)
83The Clavicle
- Slender S shaped bone
- Articulates with the sternum (manubrium) the
scapulae (acromial ends) - Structurally weak-breaks easily
- Determining left right locate the conoid
tubercle and costal tuberosity which shouyld be
facing down.
84Introductory Questions 10
- 1) Name the main parts of the pectoral girdle.
- 2) Name the two bones that articulates with both
ends of the clavicle. - 3) Why is the clavicle a bone that commonly
breaks? - 4) Describe the scapulae and make a drawing of it
with all of its structural features. - 5) Indicate if the following features are distal
or proximal - -capitulum -greater/lesser tubercle
- -intertubercular groove -coronoid fossa
- 6) Indicate if the feature can be seen on the
posterior or anterior surface of the humerus - -olecranon fossa -coronoid fossa
- -detoid tuberosity
85The Scapulae-Key Features
- Broad, Triangular shape
- Spine-posterior side
- Supraspinous infraspinous fossa
- Two processes Acromion Process
- Coracoid Process
- Glenoid Cavity
- 3 Borders Superior border
- Axillary (lateral) Border
- Vertebral (medial) Border
86The Humerus-Key Features
- Head
- Greater tubercle
- Intertubercular groove
- Deltoid tuberosity
- Olecranon fossa
- Coronoid fossa
- Trochlea
- Capitulum
- Medial epicondyle
- Lateral epicondyle
87The Scapulae
88The Humerus
89Radius and Ulna
90The Ulna Radius
- Ulna articulates w/humerus
- -Trochlear notch
- -Olecranon process
- -Coronoid process
- -Head
- -Styloid Process (medial to the body)
- Radius Has a distinct round end
- -located on the thumb side of forearm
- -Radial tuberosity
- -Head of the radius
- -Styloid process (lateral to the body)
-
91Humerus w/Ulna and Radius
92Pectoral Girdle Activity
- Go to each of the 18 Stations and answer the
following Questions for EACH BONE. - Name the Bone that has the tape labels a B on
it. If it is one of the vertebrae other than C-1
C-2 then simply write thoracic, lumber or
cervical. - Left or right (if it applies) if not write axial
Skeleton - Identify/Name skeletal features labeledA and
B - Note Only Station 1 is different and asks
multiple features and bones on the skull. For
this station only ID/answers labels A-F. Do not
worry about the three questions above for this
station.
93Carpals, Metacarpals, Phalanges
94Carpal Bones (8)
- Trapezium T (thumb)
- Trapezoid T
- Capitate C
- Hamate H (pinky)
- Scaphoid S (thumb)
- Lunate L
- Triquetrum T
- Pisiform P (pinky)
95Bones of the Pectoral Girdle and Upper Extremities
- Clavicle (2)
- Scapulae (2)
- Humerus (2)
- Ulna (2)
- Radius (2)
- Carpals w/8 each side (x2) 16
- Metacarpals w/5 each side (x2) 10
- Phalanges w/14 each side (x2) 28
-
- 10 54 64 Bones
96Current Bone Talley
- Skull 29
- Vertebral Column 26
- Thoracic cage Sternum 25
- Pectoral Girdle Upper Extremities 64
-
- Total 144
97Introductory Questions 11
- Give the number of carpals and metacarpals
present in a persons hand? - 2) What is polydactyly?
- 3) Name the three bones that make up the
ring-like pelvis. - 4) The coxal bone can be divided into three
regions. Name these regions. Which bone is the
largest? - 5) The cup-shaped structure found on the lateral
surface of the hip bone is called the . What
bone articulates here? - The two pubis bones come together to form a joint
called the . - The largest foramen in body is found in the
pelvis. Name it. - How does the female pelvis differ from the males?
Name three other differences. (See pg. 235)
98Left and Right Coxal Bones
99Femur, Tibia, and Fibula
100Key Features of the Coxal Bones
- 3 parts Ilium, Ishium, and Pubis
- Iliac Crest
- Iliac fossa
- Posterior superior iliac spine
- Anterior superior iliac spine
- Ischial spine
- Ischial tuberosity
- Greater Lesser sciatic notch
- Obturator foramen
- Acetabulum
101Anterior View of the Pelvis
102Female Pelvis
103Male vs. Female
- Pelvis male is heavier thicker
- Skull male is larger heavier
- Pelvic Cavity male is narrower longer
- Sacrum male is more narrower
- Coccyx Male is less movable
104Introductory Questions 12
- Draw a posterior view of the femur and be sure to
label all key structures and features. - Can the Linea aspera be seen on the anterior or
posterior side of the femur? - The shin bone is also called the .
- How does the tibia differ from the fibula?
- What is the largest ankle bone in the foot?
- How many Tarsals are there? Name them
- How many total bones make up a persons foot?
105Introductory Questions 13
- Draw a posterior view of the femur and be sure to
label all key structures and features. - Can the Linea aspera be seen on the anterior or
posterior side of the femur? - The shin bone is also called the .
- How does the tibia differ from the fibula?
- What is the largest ankle bone in the foot?
- How many Tarsals are there? Name them
- How many total bones make up a persons foot?
106Key Features of Femur, Tibia, and Fibula
- Femur (thigh bone)
- -Lateral Medial Epicondyle -Head neck
- -Greater Lesser Trochanter -Linea Aspera
- -Intercondylar fossa -Fovea capitis
- Tibia (shin)
- -Lateral Medial Condyle -Anterior crest
- -Medial Malleolus -Tibial Tuberosity
- -Intercondylar eminence
- Fibula
- -Lateral Malleolus
- -Head of Fibula
107Bones of the Feet
108Key Bones Features to Know in the Foot
- Tarsals Seven per foot (x2) 14
- -Calcaneous- heel bone (largest tarsal)
- -Talus - articulates with the tibia fibula
- -Navicular
- -Lateral, Medial, and Intermediate Cuniforms
- Metatarsals five per foot (x2) 10
- Phalanges 14 per foot (x2) 28
109Lateral View of the foot
110Pelvic Girdle Lower Extremity Count
- Pelvic Girdle 2
- Femur 2
- Tibia 2
- Fibula 2
- Tarsals 14
- MetaTarsals 10
- Phalanges 28
- Total 60
111Bone Talley
- Skull 29
- Vertebral Column 26
- Thoracic cage Sternum 25
- Pectoral Girdle Upper Extremities 64
- Pelvic Girdle Lower Extremities 60
-
- Total 204
- Whats Missing ??
112Practice/Review Practicum 3
- Visit 8 Stations
- 1) Old Bones Upper Extremities
- a) Name the Bone
- b) Right or Left
- c) Name the feature indicated by the yellow
arrows - 2) New Bones- Pelvic Girdle Lower
Extremities - a) Name Bone A and Bone B
- b) Determine if it is on the right or left side
of the body
113Practice/Review Practicum 4
- Visit 8 Stations
- 1. a) Name the Bone
- b) Right or Left
- c) Name the feature indicated by the yellow
arrows - 2.
114Review Practicum 4
- 20 Stations
- Two questions per station
- 40 pts total
- Bonus station in box Name the bone
- Obtain a bone of your choice and generate two
questions on a separate sheet of paper and keep
it at your desk.
115Bone ID Review Activity
- 40 Stations-Number your paper from 1-40
- Name the Bone
- Indicate Right or Left if appropriate
- Use Tape and write ID on it and choose one
feature to label on your bone - Use your Textbook and turn to the page the bone
is found so that people may reference it