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

Explanation

The components of transport system in human beings are blood and lymph. The functions of blood and lymph are as follows :
(i) Red blood cells carry oxygen form the lungs to all the cells of the body. Blood plasma carries digested food, proteins, common salt, waste products (like carbon dioxide and urea) and hormones from one part to another part in the body.
(ii) Lymph puts into circulation large protein molecules by carrying them from the tissues into the blood stream (which could not be absorbed by blood capillaries due to their large size). Lymph also carries digested fat from intestine to other tissues, and excess fluid from the extra-cellular space back into blood.