State the role and function of lymph in human transport system.
A. Lymph is a circulatory fluid. It flows in lymph vessels.
1) Lymph (is also called tissue fluid) is colourless.
2) It consists of lymphocytes which kill germs and protect the human body from infections.
3) Lymph carries digested and absorbed fat from intestine.
4) It drains excess fluid from extra cellular Space back into the blood.
5) Its flow is unidirectional i.e., from tissues -> lymph capillaries -» vein -» heart.