SYSTEMS OF THE HUMAN BODY

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SYSTEMS OF THE HUMAN BODY
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THE SKELETAL SYSTEM

• Major Organs
• Bones, cartilage, tendons and ligaments.

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The Skeletal System

Protects,



supports,
allows movement,
produces blood cells

stores minerals

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Factoids Skeletal

• The human hand has 27 bones your face has 14!
• The longest bone in your body? Your thigh bone,
  the femur -- it's about 1/4 of your height. The
  smallest is the stirrup bone in the ear which can
  measure 1/10 of an inch.
• You have over 230 moveable and semi-moveable
  joints in your body

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Major Organs Skeletal muscles and smooth
muscles throughout the body.
THE MUSCULAR SYSTEM

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The Muscular System
Allows body movement


maintains posture
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Factoids Muscular

• You have over 30 facial muscles which create
  looks like surprise, happiness, sadness, and
  frowning.
• Eye muscles are the busiest muscles in the body.
  Scientists estimate they may move more than
  100,000 times a day!
• The largest muscle in the body is the gluteus
  maximus muscle in the buttocks.

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Major Organs Mouth, esophagus, stomach, small
and large intestines
THE DIGESTIVE SYSTEM


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The Digestive System
Allows the body
to break down
food and
nutrients!
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Factoids Digestive

• HOW LONG ARE YOUR INTESTINES? At least 25 feet in
  an adult. Be glad you're not a full-grown horse
  -- their coiled-up intestines are 89 feet long!
• Chewing food takes from 5-30 seconds
• Swallowing takes about 10 seconds
• Food sloshing in the stomach can last 3-4 hours
• It takes 3 hours for food to move through the
  intestine

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Major Organs Heart, blood vessels and blood.
THE CIRCULATORY SYSTEM

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The Circulatory System
Transports nutrients
wastes, and other materials
and plays a role in the
immune system
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Factoids Circulatory

• The body of an adult contains over 60,000 miles
  of blood vessels!
• An adult's heart pumps nearly 4000 gallons of
  blood each day!
• Your heart beats some 30 million times a year!
• The average three-year-old has two pints of blood
  in their body the average adult at least five
  times more!
• A "heartbeat" is really the sound of the valves
  in the heart closing as they push blood through
  its chambers.

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Major Organs Nose, trachea and lungs.
THE RESPIRATORY SYSTEM


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The Respiratory Systems
oxygen
Exchanges

carbon dioxide
air
between
blood

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Factoids Respiratory

• Your lungs contain almost 1500 miles of airways
  and over 300 million alveoli.
• Every minute you breathe in 13 pints of air.

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Major Organs Kidneys, ureters, bladder and
urethra.

THE EXCRETORY SYSTEM
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The Excretory System
Removes
solid

liquid
wastes
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Factoids Excretory

• Ever eat kidney beans? They were named after your
  kidneys which are a similar shape and color!
• Your kidneys have about a million structures that
  filter out liquids and wastes.
• About 440 gallons of blood flow through the
  kidneys each and every day!

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Major Organs Brain, spinal cord and peripheral
nerves.

THE NERVOUS SYSTEM

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The Nervous System
Detects
sensation

controls
most
functions
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Major Organs Many glands exist in the body that
secrete endocrine hormones.  Among these are the
hypothalamus, pituitary, thyroid, pancreas and
adrenal glands.

THE ENDOCRINE SYSTEM

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THE ENDOCRINE SYSTEM
Regulates
metabolism,
reproduction

other
functions
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Factoids Endocrine

• Imagine your body without glands. You'd be
  without all the ooze, sweat, mucus, chemicals and
  juices in your body which make your body home.
• For girls, puberty generally begins sometime
  between ages 9-13 and for boys, ages 10-15!

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Major Organs Lymph, lymph nodes and vessels,
white blood cells, T- and B- cells.
THE IMMUNE SYSTEM
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The Immune System
Controls the
immune response

fights disease
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THE INTEGUMENTARY SYSTEM
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The Integumentary System
(Skin)
Protects,
Regulates
Temperature

Prevents
Water loss
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Factoids Integumentary

• As an adult, you may have more than 20 square
  feet of skin -- about the size of a blanket.
• You are likely to shed some 40 pounds of skin in
  a lifetime.
• Right now there are over a million dust mites,
  microscopic critters invisible to the naked eye,
  on your mattress and pillow, chomping on the dead
  skin cells that fell off you last night!