1. What is the Circulatory System?
The circulatory system in your body is basically a system of transportation.
It consists of your heart, blood, veins, and arteries.
It carries blood to every body part.

2. Why is Blood important? Transport
Carries Oxygen from lungs to other organs.
Carries Carbon Dioxide from all organs to the lungs for removal.
Carries other wastes to the liver and kidneys for detoxification or removal.

3. Why is Blood important? 2. Protection
Platelet factors initiate clotting and minimize blood loss.
Plays several roles in inflammation.
White Blood Cells destroy microorganisms and cancerous cells.

4. Why is Blood important? 3. Regulation
Transfers water to and from the tissues
Helps stabilize the body’s pH levels

5. How much blood do I have in my body?
Adult Females will have some where between 4 to 5 liters of blood.
Adult Males will have somewhere between 5 to 6 liters of blood.
These numbers depend on a lot of different factors. A few are:
Body Size
Genetics

6. What is blood made-up of?
Blood is made up of 4 different parts.
1. Plasma
2. Red Blood Cells (Erythrocytes)
3. White Blood Cells (Leukocytes)
4. Platelets

7. Plasma The watery liquid part of blood. 90% water
Makes up about 55% of the volume of blood.
Nutrients absorbed by the digestive tract are transported in the blood plasma.

8. Red Blood Cells (Erythrocytes)
The production of RBC’s produces about 2.5 million cells per second, which matches the rate at which old RBC’s die.
RBC’s are produced in the bone marrow
Live for about 120 days=3 months
Contain a substance called Hemoglobin.

9. What is Hemoglobin?
The component of RBC’s, which give them their special oxygen carrying proficiency as well as their color.
When Hemoglobin is present it increases the amount of oxygen a RBC can carry by 50 times.

10. RBC’s have two main functions
1. Pick up oxygen from the lungs and deliver it to other tissues.
2. Pick up Carbon dioxide from other tissues and unload it in the lungs.

11. White Blood Cells (Leukocytes)
The soldiers in the war to safeguard the body against sickness and combat infection.
They increase in number when the body is under an infectious attack.
The are diverse in shape and size, but are larger in size than RBCs.
They make-up far less of the formed elements than RBCs .
For every 1 WBC there are 700 RBCs

12. Platelets Crucial in blood clotting process.
They form plugs to stop bleeding.

13. What are Blood Types?
Type A
Type B
Type AB
Type O

14. Who can I donate blood to? Who can I receive blood from?
Type A can donate blood to a person with type A or type AB.
Type B blood can donate blood to a person with type B or type AB.
Type AB blood can donate blood to a person with type AB only.
Type O blood can donate to anyone.
Type A blood can receive blood from a person with type A or type O.
Type B blood can receive blood from a person with type B or type O.
Type AB blood can receive blood from anyone.
Type O blood can receive blood from a person with type O.
Type O blood is said to be a universal donor.
Type AB blood is said to be a universal receiver.

15. What are Arteries?
Vessels that carry blood away from the heart to all parts of the body.
Arteries are carrying blood that has been recently “pumped” by the heart.
Arteries continually branch into smaller and smaller vessels, called Arterioles.

16. 34 total Arteries in your Body

17. What are Veins?
Vessels that carry blood from the body tissues back toward the heart.
Veins are equipped with valves.
These valves prevent blood from flowing backward and ensure forward movement.

19. What connects Arteries and Veins?
Capillaries
Network of tiny vessels that connect the arteries and veins.
These vessels are the site of material exchange with the body cells.
They have very thin walls to facilitate the diffusion of materials into and out of the bloodstream.

21. Test your Knowledge What are the three functions of blood?
What is Blood made up of? (4 parts)
What are the four blood types
What are arteries main function?
What are veins main function?
Transport, Protection, and Regulation
Plasma, RBC’s, WBC’s, and Platelets
Types A, B, AB, and O
To take blood away from the heart to other body parts.
To bring blood back to the heart.