the cardiovascular system is formed by the blood, heart, and blood
vessels. The heart keeps blood circulating. The blood delivers nutrients
and oxygen throughout the entire body. The nutrients and oxygen are
released from blood vessels into an organ or cell.
system is mainly formed by the bladder and kidneys. The circulation of
blood sends waste to the kidney, which filters water soluble waste
products from the blood. This waste in our body becomes metabolic waste
(urine). The urine is then sent to the bladder, then out of our body
through the urethra.