1. The Circulatory System
Parts and Functions

2. Main Functions 1) Transports oxygen to the cells from the lung
2) Transports carbon dioxide from cells to the lung
3) Transports essential nutrients to the cells
4) Carries wastes from cells

3. 3 Types of Circulation
cardiac circulation—circulation of blood within the heart
pulmonary circulation—from heart to lungs back to heart
systemic circulation—from heart to body back to heart

4. The 3 main parts of The Circulatory system
1) Blood
2) The Blood Vessels
3) The Heart

5. Blood

6. The Composition of Blood
The Plasma (Fluid) makes up
55% of the blood volume.
The Solids (Cells) make up
45% of the blood volume.

7. Blood Plasma 97% Water Other 3% -Antibodies and Proteins
- Nutrients and Wastes

8. Blood Solids Red Blood Cells -Carry oxygen -Contain Hemoglobin
White Blood Cells
-Attack bacteria & other invaders
Platelets
-Control the blood clotting process

9. Blood
VESSELS

10. Types of Blood Vessels Arteries - carries blood away from the heart
- usually oxygenated (one exception)
Veins
- carries blood towards the heart
- deoxygenated (one exception)
Capillaries
-connect arteries/arterioles to veins/venules
- exchanges carbon dioxide oxygen
nutrients waste
Exceptions:
Pulmonary artery – artery leading from heart to lung (deoxygenated)
Pulmonary vein – vein leading from lung to heart (oxygenated)

11. Overview of Blood Vessels
Artery
Arterioles
Capillaries
Venules
Veins

12. THE HEART

13. Parts of The Heart The Atria (or Atriums) -Receiving Chambers
The Ventricles
-Pumping Chambers
The Valves
-Prevents backflow
The Septum
-Divides the Heart
Heart Contraction and Blood Flow Animation:

14. ANATOMY OF THE HEART

17. PATHWAY OF BLOOD
Make a list the structures that a red blood cell would pass through when moving in and out of your heart.

18. PATHWAY OF BLOOD a. superior vena cava or 1)b. inferior vena cava
right atrium
tricuspid valve—(AV valve)
right ventricle
pulmonary valve—(semilunar valve)
pulmonary artery (goes to lungs)

19. PATHWAY OF BLOOD 7) pulmonary vein 8) left atrium
9) bicuspid valve (left AV valve)
10) left ventricle
11) aortic valve (semilunar valve)
12) aorta

20. (3:30 min) http://www.youtube.com/watch?v=H04d3rJCLCE
HEART SOUNDS
Normal Sounds (48 sec):
(3:30 min)
When you hear your heart beating, what are you actually listening to?

21. What causes a Heart Attack?
/HeartAttack/HeartAttack_Causes.html