Circulatory System

Structure, function, blood, and other criteria

Structure and function

The main function of the circulatory system is to transport materials throughout your body. It transports nutrients, water, and oxygen to the millions and billions of cells in your body. The organs that make the circulatory system function are the heart, blood, and blood vessels. When ever you get your blood pressure taken what they are looking for is the pressure in the arteries when the heart rests between beats. Capillaries are very important not only because they are the smallest of the bodies blood vessels, but also are the sites of the transfer of oxygen and other nutrients from the bloodstream to the other tissues in the body.


The function of blood is to supply nutrients to the cells in our body, such as glucose. The white and red blood cells have different functions the white cells defend our bodies from infection and the red cells job is to transport oxygen. The RH factor is a antigen occurring on the red blood cells of most humans, close to 85%. The effects are usually hemolytic disease of the newborn and of incompatibility in blood transfusions. Blood diseases and disorders usually effect the white and red blood cells and the Platelets in your blood. The mitochondria is the cell organelle that corresponds most closely to the circulatory system.

Additional Criteria

The circulatory system interacts with the respiratory system by supplying oxygen and nutrients to the rest of the body. The circulatory system also works with the muscular system because it provides blood to the heart (a muscle) so the heart can provide it to the rest of the body.