1. Circulatory or Cardiovascular System
Objective: To relate organs in the circulatory system to their functions.

2. Function
Carry nutrients & oxygen to cells & waste and carbon dioxide away from cells
Contains cells that fight disease
Includes heart, blood vessels, blood

3. The Heart Made of cardiac muscle tissue
Pumps oxygen-rich blood from the alveoli (lungs) out to the body
Pumps oxygen-poor blood from the body into the alveoli

4. Fossilized mammalian heart

5. Check For Understanding
Which statement about the heart is false?
The heart pumps blood with fresh oxygen from the lungs to the body.
The heart pumps blood with fresh oxygen from the body to the lungs.
The heart pumps blood that lacks oxygen from the body into the lungs.
The heart is made mostly of muscle tissue.

6. Blood Vessels Hollow tubes that carry blood Three types: Arteries
Capillaries
Veins

7. Check For Understanding
Which is not a type of blood vessel?
Artery
Trachea
Capillary
Vein

8. A = AWAY! Arteries Largest blood vessels
Carry oxygen-rich blood away from the heart out to the body
Clogged arteries restrict flow of blood
A = AWAY!

9. from heart
artery

10. Normal vs. Clogged Artery

11. Clogged coronary artery

12. Check For Understanding
Which statement about arteries is true?
Arteries are the smallest blood vessels.
Arteries carry blood to the heart from cells in the body.
Arteries are part of the respiratory system.
Arteries carry blood away from the heart to cells in the body.

13. Capillaries Thinnest blood vessels In capillaries:
Oxygen leaves blood to enter body cells
Carbon dioxide leaves body cells to enter blood
connect arteries to veins

14. from heart
capillaries
artery

15. Capillaries in a cat

16. Veins Carry oxygen-poor blood back to the heart from body cells
Bring carbon dioxide and wastes back from cells to leave the body

17. from heart
to heart
capillaries
artery
vein

18. Check For Understanding
Which statement about arteries and capillaries is true?
Veins carry blood away from the heart, whereas arteries carry blood to the heart.
Both arteries and veins carry oxygen-rich blood.
Veins carry carbon dioxide toward the heart, whereas arteries carry oxygen away from the heart.

19. Check For Understanding

20. Check For Understanding