Question

what are lymph? how are they formed? what are their functions?

Answer 1

Lymph is the fluid that circulates throughout the lymphatic system. The lymph is formed when the interstitial fluid (the fluid which lies in the interstices of all body tissues)[1] is collected through lymph capillaries. It is then transported through lymph vessels to lymph nodes before emptying ultimately into the right or the left subclavian vein, where it mixes back with blood.

Since the lymph is derived from the interstitial fluid, its composition continually changes as the blood and the surrounding cells continually exchange substances with the interstitial fluid. It is generally similar to blood plasma except that it also contains white blood cells. Lymph returns proteins and excess interstitial fluid to the bloodstream. Lymph may pick up bacteria and bring them to lymph nodes where they are destroyed. Metastatic cancer cells can also be transported via lymph. Lymph also transports fats from the digestive system.


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Answer 2

Through the pores present in the walls of capillaries some amount of plasma, proteins and blood cells escape into intercellular spaces between the tissue to form the the tissue fluid or lymph.

Function :-

1. Lymph drains into lymphatic capillaries from the intercellular spaces,which join to form large lymph vessels that finally open into larger veins.

2. Lymph carries digested and absorbed fat from intestine and drains excess fluid from extra cellular space back into the blood.