Organs of the circulatory system are the heart, blood, and blood vessels (arteries and veins). The circulatory system interacts with other systems, such as the lungs (respiratory system), liver (digestive system), and kidneys (digestive system).
Skin, hair, nails, sweat and oil glands. Function: Serves as a barrier against infection and injury; helps to regulate body temperature; provides protection against ultraviolet radiation from the sun.
Health 0. The immune system is the bodyâs tool to ward off infectious agents or other foreign bodies that might gain entry into the body to cause infection or disease. The main organs that mediate immunity include the skin, the liver and kidneys along with the bloodstream itself.