1. Human Body Systems Review
Structures, Functions, and Interactions

2. Skeletal
Structures: bones, cartilage, joints, marrow Functions: provides shape and support, enables you to move, protects your internal organs Interactions: bones make your red blood cells (cardiovascular).

3. Skeletal

4. Muscular
Structures: skeletal muscle, smooth muscle, and cardiac muscle Functions: Involuntary muscles are responsible for activities such as breathing and digesting food; Voluntary muscles are under your control Interactions: All systems b/c all of your organs are made of muscle

5. Muscular

6. Nervous
Structures: brain, spinal column, nerves. Functions: detects & interprets info from inside and outside the body; control center Interactions: Tells muscles to contract (voluntary), tells heart to pump (involuntary)

7. Nervous

8. Endocrine
Organs: glands such as hypothalamus, thyroid, ovaries, testes Functions: Controls body functions by using chemicals from glands Interactions: Sends growth hormones to skeletal system, releases adrenaline into the blood stream to stimulate the muscles into action.

9. Endocrine

10. Digestive
Structures: Mouth, esophagus, liver, stomach, gallbladder, pancreas, large intestines, small intestines, rectum Function: breaks down food into molecules the body can use, and eliminates waste Interactions: Uses the circulatory system to take food to the individual cells, forms the end of the excretory system to expel solid waste.

11. Digestive

12. Lymphatic System
Organs: Tonsil, Spleen, Thymus, Lymph Nodes Function: returns leaked fluids to blood vessels and helps get rid of bacteria and viruses. Interactions: White blood cells made in the bones grow into T cells in the thymus.

13. Lymphatic System

14. Integumentary System
Organs: Skin, Hair, Nails Functions: Protects, keeps water in, foreign particles out, allows you touch, regulates temperature, gets rid of wastes Interactions: Works with the nervous system to keep you aware of your surroundings.

15. Integumentary System

16. Digestive System (Lower part)
Structures: Large Intestines, rectum, anus Functions: Material that cannot be absorbed into the blood stream is compacted in the large intestines for elimination. Interactions: The large intestine absorbs water into the cardiovascular system for use throughout the body.

17. Digestive System (Lower Part)

18. Urinary
Structures: kidney, urinary bladder, urethra Functions: Blood is filtered through the kidneys to remove cell/body waste. Waste is stored in the bladder and eliminated as urine. Interactions: Cleans waste from the circulatory system.

19. Urinary

20. Respiratory
Structures: Nose, Lungs, Wind Pipe Function: Moves oxygen into the body and removes carbon dioxide and water from the body. Interactions: Circulatory system carries oxygen to the cells and carbon dioxide away.

21. Respiratory

22. Circulatory or Cardiovascular
Structures: Heart, blood vessels Functions: Heart pumps blood through all blood vessels. Interactions: Highway system of the body, carries food (digestive) and oxygen (respiratory) to the cells and carries waste away.

23. Cardiovascular

24. Reproductive
Structures: Testes, ovaries, and uterus Function: Create a new living individual Interactions: The endocrine system regulates the hormones necessary for sexual maturity and reproduction.