1. Circulatory (Cardiovascular) System

2. Cardiovascular System
Cardio = “heart”
Vascular = “vessels”

3. Circulatory (Cardiovascular) System
Made up of heart, vessels, and blood

4. Three Types of Blood Vessels
Arteries - move
blood away from
the heart

5. Three Types of Blood Vessels
Arteries - move blood
away from the heart
Veins - move blood
toward the heart

6. Three Types of Blood Vessels
Arteries - move blood away from the heart
Veins - move blood toward the heart
Capillaries -
microscopic blood
vessels that connect
arteries and veins

7. Functions of the Blood
Carries oxygen from lungs to all body cells and removes carbon dioxide from the cells
Red blood cell
White blood cell

8. Functions of the Blood
Red blood cells – contain hemoglobin which combines with oxygen. These cells deliver oxygen to the body.
Their disc shape helps them squeeze through vessels.
They wear out and are replaced every four months. New red blood cells are produced in the bone marrow.
Red blood cell

9. Functions of the Blood
Carries waste products of cell activity to the kidneys to be removed from the body

10. Functions of the Blood
Transports nutrients from the digestive system to body cells

11. Functions of the Blood
Materials in the blood help fight infection and heal wounds (white blood cells and platelets).
Platelets: help blood form clots
White blood cell: fights foreign invaders

12. Functions of the Blood
White blood cells – are generally larger than red blood cells. They can move out of your blood through the capillary walls into tissue fluid and lymph.
They then travel around fighting disease. The white blood cells last 13–20 days, after which they are destroyed by the lymphatic system.
White blood cell: fights foreign invaders

13. Functions of the Blood
Platelets – are irregularly-shaped, colorless bodies that wear out within 5–10 days
Their sticky surface lets them, along with calcium, vitamin K, and fibrinogen, form clots to stop bleeding.
Platelets: help blood form clots

14. Which two substances does the blood transport away from body cells?
Oxygen & carbon dioxide
Carbon dioxide & waste
Nutrients & waste
Oxygen & nutrients 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

15. What parts of the blood help fight off disease and heal injuries?
White blood cells & platelets
Red blood cells & platelets
White blood cells & red blood cells
White blood cells & plasma 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

16. Which is not a function of the circulatory system?
Carry nutrients & oxygen to body cells
Carry carbon dioxide & waste away from body cells
Attack disease-causing bacteria
Produce chemicals that control body processes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31