2. Functions of the Circulatory System
Transports oxygen and nutrients
Carries disease-fighting materials produced by the immune system
Contains cell fragments and proteins for blood clotting
Distributes heat throughout the body to help regulate body temperature

3. Circulatory System
3 types of Blood Vessels
Arteries
Veins
Capillaries

4. Arteries
Oxygenated blood is carried away from the heart.
***(With the exception of the PULMONARY ARTERY, which carries deoxygenated blood to the lungs)

5. Veins
Carry deoxygenated blood back to the heart
***(with the exception of the PULMONARY VEIN, which carries oxygenated blood back to the heart)

6. Capillaries
Microscopic blood vessels where the exchange of important substances and wastes occur
The walls are only one cell thick.

7. The Heart
A hollow, muscular organ that pumps blood throughout the body
Pumps oxygenated blood to the body
Pumps deoxygenated blood to the lungs

8. Structure of the Heart
Divided into four compartments called chambers
The right atrium and the left atrium receive blood returning to the heart.
The right ventricle and left ventricle pump blood away from the heart.

9. A strong muscular wall- septum separates the left side of the heart from the right side of the heart.
Valves separate the atria from the ventricles and keep blood flowing in one direction.

10. Circulatory System Circulatory, Respiratory, and Excretory Systems
Section 1
Circulatory, Respiratory, and Excretory Systems
Circulatory System

11. How the Heart Beats -Basics
The atria fill with blood.
The atria contract, filling the ventricles with blood.
The ventricles contract, pushing blood out of the heart

12. Blood Flow through the Heart and Body
Deoxygenated blood flows from the right atrium through the tricuspid valve into the right ventricle and is pumped through the pulmonary valve into the pulmonary arteries that lead to the lungs.
Oxygenated blood flows from the lungs through the pulmonary vein to the left atrium of the heart.

13. Section 1
Circulatory, Respiratory, and Excretory Systems
Circulatory System
The blood moves from the left atrium through the bicuspid/mitral valve into the left ventricle, which pumps the blood through the aortic valve into the largest artery in the body, the aorta.
Oxygen is released from the blood into the body cells by diffusion, and carbon dioxide moves from the cells to the blood by diffusion.

14. Section 1
Circulatory, Respiratory, and Excretory Systems
Circulatory System
Pulse
The alternating expansion and relaxation of the artery wall caused by contraction of the left ventricle
Blood Pressure
A measure of how much pressure is exerted against the vessel walls by the blood
Blood Pressure

15. Components of Blood Plasma
Watery part of blood that carries nutrients and waste products from the cells
Platelets
Clotting agent of blood that contains fibrin - protein that traps platelets and RBCs at the site of a wound

16. White Blood Cells
Recognize, fight and kill disease-causing organisms
Red Blood Cells
Carry oxygen to all of the body’s cells on an iron-containing protein called hemoglobin (makes RBCs red)

17. Blood Types
There are four types of blood—A, B, AB, and O.
Rh Factor
Another marker found on the surface of red blood cells

18. Blood Typing- ABO & Rh system
Type
Marker on the RBC
Antibodies
Other Info A
Marker A
Anti-B
Attacks B blood B
Marker B
Anti-A
Attacks A blood AB
Marker A & B
None
Universal Recipient O
Anti-A & Anti-B
Universal Donor
Rh+
(positive)
Rh factor
None
May receive +/-
blood
Rh- (negative)
Anti-Rh
Only Rh –

19. Click here to review antigens and antibodies in a labeling activity.
Blood Type Exercise
Click here to review antigens and antibodies in a labeling activity.
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