The circulatory system has many functions necessary for life support, including the supply of breathing nutrients and the removal of wastes or toxic substancesThe circulatory system delivers nutrients and oxygen to the cells and removes waste, such as carbon dioxide, from the cells.To do this, blood circulates and circulates the lungs. Physical circulation begins when the left ventricle pumps oxygen-rich blood all over the body.Blood flows from the left ventricle into the aorta, and then through several arteries that split from the femoral vein and eventually into the microscopic capillaries.The circulatory system transmits the digestible nutrients to the cells of the body.This nutrient is absorbed through the walls of the small intestine and enters the capillaries. Blood carries most of the nutrients to the liver.The liver takes certain nutrients from the blood, stores them, and releases them when the body needs them, or converts them into substances that the body needs.The circulatory system acts as a treatment for waste and toxic substances in the body, such as carbon dioxide, salt, ammonia, etc.The circulatory system serves to protect our body from disease.White blood cells destroy germs, viruses, and lymphocytes create antibodies, which neutralize various pathogens. Blood also helps keep body temperature constant by distributing heat absorbed from energy-producing cells.When the body temperature starts to rise, more blood flows into the blood vessels on the skin. As a result, heat from cells deep inside the body is transferred to the skin and released outside the body. Body temperature to reduce the heat is emitted outside the amount of blood flowing under the skin sajakamyeon from.The circulatory system also carries hormones produced by endocrine glands, such as the dorsal gland and pituitary gland.They are carried by blood to control the activity of various organs and tissues.