Cardiovascular System intain homeostasis Blood Vessels) 循 Homeostasis The circulatory system contributes to ss by transporting o,, CO ne part of the body to another 环 系 统 生 cells Cells need to have O, and nutrients 理 ed by the circulatory system in order to generate the energy needed to power life-sustaining celular actIvities by the fouowing chemical reaction Food.0-CO,+H,O+Energy循环系统生理