*The cardiovascular system transports oxygen and nutrients to the cells of all the organs.
Molecules transported by cardiovascular system are nutrients such as amino acids and electrolytes, CO2, oxygen, hormones and all necessary components for the properly working of the cell (nourishment, fighting diseases, stabilizing temperature and pH, and maintaining homeostasis).
*Blood vessels also transport waste from the cells which is later excreted by the urinary system.
Waste taken from the cells to the blood is then filtered out from the blood as it flows through the kidneys. That waste leaves the body in the form of urine.
*Contractions of the muscular system keep blood moving while the skeletal system protects the heart and produces red blood cells.
Smooth muscles surround blood vessels of the circulatory system and are responsible for the constriction and dilatation of them. The cardiac skeleton is located around heart and has protective function. Red blood cells are produced by bone marrow which is located within the bones.
*The cardiovascular system transports the hormone produced by the endocrine system, moving them from glands to their target organs.
Endocrine glands produce hormones and release them into the blood and that is what distinct them from exocrine glands.
*Interactions between the cardiovascular system and all other body systems help the body maintain its internal balance, or homeostasis.
All systems work together to resist changes and to maintain a stable, relatively constant organism.