1. Our Circulatory System

2. The Circulatory System Why is it so important to us? On average, your body has about 5 liters of blood continually traveling through it by way of the circulatory system. The heart, the lungs, and the blood vessels work together to form the circle part of the circulatory system. The pumping of the heart forces the blood on its journey. blood vessels

3. Why is it so important to us? Each time your heart beats, it pumps blood through your arteries. your blood is made up of red blood cells carrying oxygen, white blood cells that fight disease, platelets that help the blood to clot, and a liquid called plasma. After your body takes what it needs and gives back what it does not need, the blood makes a return trip through your veins. So arteries lead away from your heart, and veins lead back..

4. Parts of the system …. Your circulatory system is makde up of your heart, arteries, veins, and very thin blood vessels called capillaries.circulatory system

5. The Heart

6. Parts of the System

7. The Parts of this System The body's circulatory system really has three distinct parts: pulmonary circulation, coronary circulation, and systemic circulation. Or, the lungs (pulmonary), the heart (coronary), and the rest of the system (systemic).pulmonary circulationcoronary circulation systemic circulation

8. What other systems does it rely upon? Each part of this system must be working independently in order for them to all work together It also relies upon the skeletal system for support and the digestive system for nutrients as well as the circulatory system for oxygen.

9. The Heart..How it works. The function of the right side of the heart (see right heart) is to collect de- oxygenated blood, in the right atrium, from the body and pump it, via the right ventricle, into the lungs (pulmonary circulation) so that carbon dioxide can be dropped off and oxygen picked up (gas exchange). This happens through a passive process called diffusion.right heartright atriumright ventriclepulmonary circulationgas exchangediffusion

10. The Heart The left side (see left heart) collects oxygenated blood from the lungs into the left atrium. From the left atrium the blood moves to the left ventricle which pumps it out to the body. On both sides, the lower ventricles are thicker and stronger than the upper atria. The muscle wall surrounding the left ventricle is thicker than the wall surrounding the right ventricle due to the higher force needed to pump the blood through the systemic circulation.left heartlungsleft atriumleft ventriclesystemic circulation

11. The Heart

12. What happens if part of it stops functioning ? We are unable to survive if this occurs. Loss of blood circulation or blood clots may occur and lead to strokes or heart attacks.

13. Sources http://www.fi.edu/biosci/ http://en.wikipedia.org/wiki/Heart http://www.biologycorner.com/resources/aortic_arch.jpg

14. Sources continued http://www.kidport.com/grade5/Science/BodyBones.htm http://www.innerbody.com/htm/body.html http://www.medtropolis.com/VBody.asp http://sln.fi.edu/biosci/heart.html http://www.kitses.com/animation/digestion.html