Question

What is lymph? Write its function?

Answer 1

About 90% of fluid that leaks from capillaries eventually seeps back into the capillaries and the remaining 10% is collected and returned to blood system by me of a series of tubules known as lymph vessels or lymphatics.

The fluid inside the lymphatics is called lymph. The lymphatic system consists of a complex network of thin walled ducts (lymphatic vessels), filtering bodies (lymph nodes) and a large number of lymphocytic cell concentrations in various lymphoid organism.

The lymphatic vessels have smooth walls that run parallel to the blood vessels, in the skin, along the respiratory and digestive tracts. These vessels serve as return ducts for the fluids that are continually diffusing out of the blood capillaries into the body tissues.

Lymph fluid must pass through the lymph nodes before it is returned to the blood. The lymph nodes that filter the fluid from the lymphatic vessels of the skin are highly concentrated in the neck, inguinal, axillaries, respiratory and digestive tracts.

The lymph fluid flowing out of the lymph nodes flow into large collecting duct which finally drains into larger veins that runs beneath the collar bone, the subclavian vein and is emptied into the blood stream. The narrow passages in the lymph nodes are the sinusoids that are lined with macrophages.

The lymph nodes successfully prevent the invading microorganisms from reaching the blood stream. Cells found in the lymphatics are the lymphocytes. Lymphocytes collected in the lymphatic fluid are carried via the arterial blood and are recycled back to the lymph. Fats are absorbed through lymph in the lacteals present in the villi of the intestinal wall.

Comments

The fluid inside the lymphatics is called lymphy.
The lymph nodes successfully prevent the invading microorganisms.Fats are absorbed through lymph.
This is answer for lymph.
Not you answer.

Answer 2

Lymph is the fluid that circulates throughout the lymphatic system.
It is formed when the interstitial fluid is collected through lymph capillaries.
It is then transported through larger lymphatic vessels to lymph nodes, where it is cleaned by lymphocytes before emptying ultimately into the right or left subclavian vein, where it mixes back with the blood. 
An important function of lymph is that it captures the bacteria and bring them to lymph nodes, where they are destroyed. 
It also helps in the absorption of fatty acids and transport of fat and chyle to the circulatory system. 
It helps in the production of immune cells- lymphocytes, monocytes antibody-producing cells (plasma cells).