Human+Body+-+CirculatorySystem

__Human Body/CirculatorySystem__
[|(2 minute video lesson)] [|Circulatory System interactive] 

What does the circulatory system look like?
The heart is about the size of a fist. The blood vessels are long, thin tubes that carry blood. There are thousands of blood vessels. If you stretched them all out, one person's blood vessels would cover over 60,000 miles! = What are the parts of the the circulatory system? = The circulatory system includes the heart, blood, and blood vessels. Blood vessels are the tubes that carry blood all over the body. Arteries, veins, and capillaries are all different kinds of blood vessels. ([|5th grade student made video]) 

What is the function of the the circulatory system?
The job of the circulatory system is to carry oxygen and nutrients from food to all the parts of the body. Then waste products like carbon dioxide are carried back out. This is all done by the blood which travels through the blood vessels. The job of the heart is to pump the blood all over the body. The circulatory system is very important. Without it, the rest of the body would starve. 

How does the the circulatory system interact with other parts of the body?
Blood vessels stretch to every organ of the body. Blood flows through our whole body. The circulatory system works with the respiratory system to get the oxygen into the bloodstream. The digestive system gets nutrients into the blood. After blood takes the oxygen and nutrients to organs, it picks up wastes. Carbon dioxide is taken back to the lungs and breathed out. Blood also flows through the kidneys to be cleaned. 

How can you keep your the circulatory system healthy?
Getting exercise and eating healthy food helps keep the heart healthy. Sometimes, the circulatory has problems like high blood pressure or high cholesterol. Diet, exercise, and sometimes medication can help those problems.