What are the components of the transport system in human beings? What are the functions of these components?

Explanation

There are two main transport systems in human beings :
1. Blood vascular system.
2. Lymphatic system.
Components of blood vascular system
1. Blood. It is a reddish viscous fluid connective tissue. In an adult human being, it is 5-6 litres in amount. Blood consists of two parts - plasma and formed elements. (RBCs, WBCs and blood platelets). Blood transports digested food, oxygen, carbon dioxide, nitrogenous wastes and hormones in the body.
2. Heart. It is a hollow, muscular pumping organ. The heart, in fact, has four water tight chambers, the receiving chambers called auricles or atria and the distributing chambers ventricles. The left auricle receives purified blood from the lungs, and empties into left ventricle. The left ventricle distributes blood to various organs and tissues through the blood vessels. The right auricle receives impure blood from all parts of body and empties it into the right ventricle. The latter sends the blood to lungs. Heart pumps the blood in the body.
3. Blood vessels. The blood vessels which carry oxygenated blood are called arteries. They divide to form capillaries of finer dimensions. Exchange of materials takes place across the capillaries. It is possible because the walls of capillaries are extremely thin. The blood from the tissues is returned by veins. Components of Lymphatic system 1. Lymphd 2 . Lymph vessels 3. Lymph capillarics 4. Lymph nodes.