What is lymph? How is the composition of lymph different from blood plasma? What is the direction of its flow? List two functions of the lymphatic system.

(N/A) Lymph is a clear,colourless fluid that acts as a circulatory medium within the lymphatic system. It is formed from the interstitial fluid that enters the lymphatic capillaries.
Composition difference:
Lymph is similar to blood plasma in composition but contains significantly less protein and lacks red blood cells and platelets.
Direction of flow:
Lymph flows in a unidirectional manner,moving from the interstitial spaces (tissues) towards the heart.
Functions of the lymphatic system:
$(i)$ It transports digested and absorbed fats from the intestine into the bloodstream.
(ii) It drains excess interstitial fluid from the extracellular spaces back into the blood,maintaining fluid balance.