There are two: the digestive system and the cardiovascular system.
Explain the mechanisms involved in disrupting body systems?
Nutrients help parts of you body systems and your overall body work better.
Cardiovascular system is the circulatory system. Cardiovascular is the heart and blood arteries, capillaries and veins.
digestive and excretory
digestive and excretory
The veins are what transport key nutrients to the rest of the body's systems. Without the veins, the body systems would not function. For example, the veins have pathways to the brain which relies entirely on the many nutrients the blood provides it.
respiratory, circulatory, muscular and nervous
you tell me
the digestive system
http://wiki.answers.com/FAQ/6462excretory
digestive system
integumentary, muscular, and skeletal systems