1. MAJOR ORGAN SYSTEMS IN THE HUMAN BODY
SCIENCE, TECHNOLOGY, & SOCIETY CLASS
MR. CANOVA
PERIOD 11

2. THE 11 MAJOR ORGAN SYSTEMS OF THE HUMAN BODY:
Circulatory
Digestive
Endocrine
Excretory
Immune
Integumentary
Muscular
Nervous
Reproductive
Respiratory
Skeletal

3. 1) Circulatory System Major Structures:
Heart, Blood vessels, Blood (cardiovascular), lymph nodes and vessels, lymph (lymphatic)
Functions:
Transports nutrients, wastes, hormones, and gases

4. 2) Digestive System Major Structures:
Mouth, Throat, Esophagus, Stomach, Liver, Pancreas, Small intestine, Large intestine
Functions:
Extracts and absorbs nutrients from food; removes wastes; maintains water and chemical balances

5. 3) Endocrine System Major Structures:
Hypothalamus, pituitary, pancreas
Functions:
Regulates body temperature, metabolism, development, and reproduction; maintains homeostasis; regulates other organ systems

6. 4) Excretory System Major Structures:
Kidneys, urinary bladder, ureters, urethra, skin, lungs
Functions:
Removes wastes from blood; regulates concentration of body fluids

7. 5) Immune System Major Structures:
White blood cells, lymph nodes and vessels, skin
Functions:
Defends against pathogens and disease

8. 6) Integumentary System
Major Structures:
Skin, nails, hair
Functions:
Protects against injury, infection, and fluid loss; helps regulate body temperature

9. 7) Muscular System Major Structures:
Skeletal, smooth, and cardiac muscle tissues
Functions:
Moves limb and trunk; moves substances through body; provides structure and support

10. 8) Nervous System Major Structures:
Brain, spinal cord, nerves, sense organs
Functions:
Regulates behavior, maintains homeostasis; regulates other organ systems; controls sensory and motor functions

11. 9) Reproductive System Major Structures:
Testes, penis (males), ovaries, uterus, breasts (females)
Functions:
Produces gametes and offspring

12. 10) Respiratory System Major Structures: Lungs, nose, mouth, trachea
Functions:
Moves air into and out of the lungs; controls gas exchange between blood and lungs

13. 11) Skeletal System Major Structures: Bones and joints Functions:
Protects and supports the body and organs; interactions with skeletal muscles; produces red blood cells, white blood cells, and platelets

14. * We’ll be taking a look at how all the systems must work together as one unit for the human body to function properly. * In health class, you’ll be taking a look at the problems that can arise in each of the organ systems.