DO NOW

1
DO NOW
7th Grade Science

• Create a Venn Diagram to compare the Respiratory
  and Circulatory systems.

2
QUIZ-STUDY (5 min)
7th Grade Science

• Study the structures and functions of the
  circulatory and respiratory systems.
• Be sure to take a look at the steps in which
  blood circulates to lungs, heart, and cells on
  the body.

3
QUIZ
7th Grade Science

• SWITCH PAPERS WITH SOMEONE NEAR YOU.

4
7th Grade Science
DO-NOW
Pick up a Qwizdom remote and use it to select the
words that best complete the statements below.
You will use each word once.
Veins return __(1)__ blood back to the heart.
The heart then pumps the oxygen poor blood to
either the right or left __(2)__. There, the
blood picks up oxygen and drops off carbon
dioxide at the __(3)__. Next, the __(4)__ blood
returns back to the heart. The oxygen rich blood
is pumped away from the heart through __(5)__.
As it travels, the blood passes through very tiny
blood vessels called __(6)__, where it delivers
its O2 load to the cells and picks up their
waste, like CO2. Then it returns back to the
heart and the cycle repeats.

• Answer Choices
• Oxygenated
• Deoxygenated
• Arteries
• Lung
• Capillaries
• Alveoli

5
7th Grade Science
Todays Schedule

1. Do-Now
2. Heart structure and function
3. Review Dissection Safety
4. Heart Observations

Essential Questions
Dark Matter
Homework is due Friday, Dec. 2nd
How do different body structures function
together to sustain life?
6
7th Grade Science
Observations
Written Observations Anterior (front) Side
Sketch Anterior (front) Side
Written Observations Posterior (Back) Side
Sketch Posterior (Back) Side
7
7th Grade Science
Observations
What I Think
What I Know
I think the difference between the white and gray
tissue is that ____.
We will fill this in after the dissection
I think the large, diagonal line across the heart
is ____.
I think one half of the heart is larger than the
other half because _____.
8
7th Grade Science
The Heart
How does the heart work? http//library.med.utah.
edu/kw/pharm/hyper_heart1.html
9
7th Grade Science
Dissection Safety
Hold scalpel properly it is extremely sharp.
Where goggles at all times
Do not taste or eat any part of the heart
Wear gloves and avoid contact with skin
10
7th Grade Science
Heart Dissection Procedures

• Objective Locate the blood vessels that supply
  (feed) the heart with blood.
• Structures
• Coronary Artery
• Coronary Vein
• Functions
• The coronary arteries deliver oxygenated blood to
  the heart.
• The coronary veins remove deoxygenated blood from
  the heart.

11
7th Grade Science
Heart Dissection Procedures

• Objective Identify the veins that deliver
  deoxygenated blood to the heart.
• Structures
• Superior Vena Cava
• Inferior Vena Cava
• Functions
• Superior Vena Cava returns blood from the top
  half of the body
• Inferior Vena Cava returns blood from the bottom
  half of the body

Superior V.C.
Inferior V.C.
Posterior (Back) View
12
7th Grade Science
Heart Dissection Procedures

• Objective Expose the 2 chambers of the heart
  that hold and pump deoxygenated blood.
• Procedures
• Locate superior vena cava
• Make an incision (cut) beginning at the superior
  vena cava to the bottom of the heart.
• Cut deep enough that you can open the heart like
  a book.

Posterior (Back) View
13
7th Grade Science
Heart Dissection Procedures

• Objective Identify the 2 chambers of the heart
  that hold and pump deoxygenated blood.
• Structures
• Right Atrium
• Right Ventricle
• Tricuspid Valve
• Functions
• Right atrium receives blood from the superior
  and inferior vena cava
• Right ventricle pumps blood to the lungs.
• Tricuspid valve prevents blood from flowing
  backwards

Tricuspid Valve
Right Atrium
Right Ventricle
14
7th Grade Science
Heart Dissection Procedures

• Objective Identify the blood vessel that carries
  deoxygenated blood to the lungs.
• Structures
• Pulmonary Arteries
• Functions
• The pulmonary arteries carry deoxygenated blood
  away from the heart to the lungs.
• Procedures Using your finger or a probe, locate
  the opening inside the right ventricle that leads
  to the pulmonary arteries.

Tricuspid Valve
Right Atrium
Right Ventricle
15
7th Grade Science
Heart Dissection Procedures

• Objective Identify the blood vessels that
  transport oxygenated blood to and from the heart.
  
• Structures
• Pulmonary Vein
• Aorta
• Functions
• The pulmonary veins deliver oxygenated blood from
  the lungs to left atrium of the heart.
• The aorta is the artery than moves oxygenated
  blood out of the heart.

Aorta
Pulmonary Artery.
Aorta
Superior V.C.
Pulmonary Vein
Posterior (Back) View
16
7th Grade Science
Heart Dissection Procedures

• Objective Expose the 2 chambers of the heart
  that hold and pump oxygenated blood.
• Procedures
• Locate aorta
• Make an incision (cut) beginning at the aorta,
  continuing through the pulmonary vein, and ending
  at the bottom of the heart.
• Cut deep enough that you can open the heart like
  a book.

Aorta
Superior V.C.
Pulmonary Vein
Posterior (Back) View
17
7th Grade Science
Heart Dissection Procedures
Left Atrium

• Objective Identify the 2 chambers of the heart
  that hold and pump oxygenated blood.
• Structures
• Left Atrium
• Left Ventricle
• Mitral Valve
• Functions
• Left atrium receives blood from the pulmonary
  veins.
• Left ventricle pumps blood out the aorta to the
  body.
• Mitral valve prevents blood from flowing backwards

Mitral Valve
Left Ventricle
Posterior (Back) View
18
7th Grade Science
Heart Dissection Procedures
Left Atrium
Aorta

• Objective Locate the opening inside the left
  ventricle that leads to the aorta.
• Procedures Using your finger or a probe, locate
  the opening inside the Left ventricle that leads
  out to the aorta.

Mitral Valve
Left Ventricle
Posterior (Back) View
19
7th Grade Science
Clean-Up Procedures

1. Place your heart into plastic bag and write your
   table number and period on the bag.
2. Clean dissection tray
3. Throw away large pieces of tissue in garbage
4. Clean tray with sponge and water.
5. Clean dissection tools
6. Use hand brush
7. Wipe table down with disinfectant wipe
8. Place tray and dissection tools back on front
   bench .

20
7th Grade Science
Conclusion
What I Think
What I Know
I think the difference between the white and gray
tissue is that ____.
I think the large, diagonal line across the heart
is ____.
I think one half of the heart is larger than the
other half because _____.
21
7th Grade Science
EXIT TICKET
Pick up a Qwizdom remote and use it to select the
words that best complete the statements below.
You will use each word once.
Veins return __(1)__ blood back to the heart.
The heart then pumps the oxygen poor blood to
either the right or left __(2)__. There, the
blood picks up oxygen and drops off carbon
dioxide at the __(3)__. Next, the __(4)__ blood
returns back to the heart. The oxygen rich blood
is pumped away from the heart through __(5)__.
As it travels, the blood passes through very tiny
blood vessels called __(6)__, where it delivers
its O2 load to the cells and picks up their
waste, like CO2. Then it returns back to the
heart and the cycle repeats.

• Answer Choices
• Oxygenated
• Deoxygenated
• Arteries
• Lung
• Capillaries
• Alveoli

22
DO NOW
7th Grade Science

• Use your notes to fill in the spaces

SYSTEM FUNCTION
Nervous
Endocrine
Respiratory
Circulatory
23
TEST REVIEW
7th Grade Science

• Test is on Monday!