1. 7.L.3B.2 Construct explanations for how systems in the human body (including circulatory, respiratory, digestive, excretory, nervous, and musculoskeletal systems) work together to support the essential life functions of the body.

2. Circulatory system

3. Main function
The main function of the circulatory system is to transport blood to all parts of the body so that gases, nutrients, and waste products are transported to and from the cells

4. 3 major parts of the circulatory system
Blood Vessels - routes blood travels
Heart – pumps or pushes blood through body
Blood – carries important “ *stuff ” through body
Stuff includes oxygen, food, and waste

5. Blood vessels
Blood Vessels resemble very long and skinny tunnels that are all through your body.

6. 3 types of blood vessels
Arteries
Capillaries
Veins

7. Arteries Carry blood Away from the heart
Carries blood that has oxygen & nutrients to all parts of the body

8. Move waste products from parts of the body back to the heart & lungs
Veins
Move waste products from parts of the body back to the heart & lungs

9. Capillaries Connecting arteries & veins
Oxygen & nutrients leave blood to go into cells
Carbon dioxide & waste products enter blood from cells
exchange

10. The heart 4 chambers ( or compartments )
2 upper chambers : Left Atrium Right Atrium
2 lower chambers : Left Ventricle
Right Ventricle

11. Blood 4 parts
Plasma
Red blood cells
White blood cells
Platelets

12. Plasma
Liquid part of blood

13. Red blood cells
Carry oxygen to all parts of the body

14. Fight and kill germs that may enter your bloodstream
White blood cells
Fight and kill germs that may enter your bloodstream

15. Form scabs when you cut yourself Help stop bleeding
platelets
Form scabs when you cut yourself
Help stop bleeding