Write one function of each of the following components of the transport system in human beings:
(a) Blood vessels
(b) Lymph
(c) Heart

(a) Blood vessels: They are the parts of the circulatory symtem which carry blood throughout the body.
(b) Lymph: It is a clear fluid that travels through the tissues to dense them and keep them firm. It transports white blood cells to and from the lymph nodes into the bones.
(c) Heart: It is a muscular organ which pumps blood throughout the body which causes blood circulation.