The cardiovascular system transports needed substances to cells and transports waste products away from cells.
pumping blood through the body shouldn't you be doing ur own home work...
cardiovascular system
blood
The most important part of the Circulatory Sytem is the capillaries.
Smoking cigarettes is damaging to your cardiovascular system, as well as your lungs. There is no benefit. Don't smoke.
Lots of them. The most common is heart disease.
Most people call this an organ system.
it protects the internal organs of the body.
cardiovascular system
The most important function of the cerebellum (if your a student the most you will probably be tested on in a gen bio class) is the control of balance and fine motor function, like walking.
The most important function is the skin.
The most obvious answer would be the Circulatory system; however, the Lymph system also transports material throughout the body, it could be compared to the sewer system in a city. If this is for homework though, the right answer would most assuredly be Circulatory system.
Most people do know that smoking, obesity and excessive alcohol use are adverse to the cardiovascular system, but repeating this information in a positive (not guilt producing) way is helpful.