The circulatory system is an organism that allows blood to be distributed and convey nutrients, carbon dioxide, oxygen, hormones, and blood cells to and from the cells in the body to offer nourishment and assist in fighting illnesses, stabilize temperature and pH, and preserve homeostasis.
It carries nutrients, respiratory gases, and metabolic items throughout a living organism, permitting assimilation among the various tissues. The circulation process includes the consumption of metabolic materials, the delivery of these materials throughout the organism, and the return of harmful by-products to the environment.
All living organisms take in molecules from their environments to support their matter's metabolism and release the products back into the environment.