2. Human Body Systems

3. Levels of Organization 1- cells 2- tissues 3- organs 4- organ systems 5- organism

4. Each system works together to help us function and survive

5. Skeletal System

6. The framework of your body and it is made of 206 living bones (300 in babies)

7. 5 Functions of the skeletal system 1. Gives shape and support to your body

8. 2. Protects your internal organs =

9. 3. Muscles attached to your bones help you move

10. 4. Marrow in the center of bones makes blood cells (2.5 million/second)

11. 5.Bones store calcium and phosphorus for our body - Ca helps our heart and muscles work -P helps our cells produce and store energy -When stored in our bones, Ca and P help make bones stronger

12. Muscular System

13. Over 600 muscles make movement possible

14. 2 Functions of the Muscular System 1. Helps your body move

15. 2. Produces heat for your body (through exercise or shivering)

16. Integumentary System Our largest system, made up of one organ: –Skin

17. 4 Functions 1.Protection

18. 2. Sensory Response

19. 3. Vitamin D formation http://www.nature.com/news/skeletons-show-rickets-struck-the-medici-family-1.13156

20. 4. Maintain body temperature- using blood vessels constricting and sweating

21. Digestive System Helps provide energy for our body

22. 1 Function: Break down food into small molecules so it can be absorbed and moved by the blood stream which delivers it to your cells for energy.

23. Circulatory System A delivery system

24. 2 Functions 1. Blood delivers nutrients (food) and oxygen to cells so they can function.

25. 2. Blood removes waste products, like carbon dioxide, from cells.

26. Respiratory System Exchanges air

27. 1 Function http://www.goldiesroom.org/Note% 20Packets/13%20Human%20Othe r/00%20Human%20Other%20Syst ems--WHOLE.htm –Supplies body with fresh oxygen (needed by cells) and removes carbon dioxide (waste product)

28. Both circulatory and respiratory systems work closely together

29. Excretory System Any system that eliminates wastes

30. Included in excretory system are: Digestive-water and undigested food out Respiratory- carbon dioxide and water out Skin-sweat and salts out Urinary-water, metabolic wastes and salts out

31. Urinary System: Function It filters your blood and removes wastes produced by your cells Fluid levels in the body are also maintained by the urinary system

32. Nervous System A control system

33. Function Allows your body to react to your environment and stimuli.

34. Endocrine System A control system for your body

35. Functions Uses chemicals (hormones) to: a. Regulate internal environment

36. Functions b. Adapt to stressful situations

37. Functions c. Promote growth and development

38. Functions d. Coordinate circulation, digestion, and absorption of food.