Students around the world who had studied Biology would have heard the term Lymph but would not have given much importance to this topic owing to some unknown reason.  The interesting fact about this is the fact that the whole body is encompassed with the lymph vessels similar to the blood vessels and has a complex nature.  The cells of the body are supported really well by them as it receives oxygen and nutrients from the same. The lymph gets recirculated through the vessels themselves as they have no end point.

The lymph fluid would be pumped away from the cells by the lymph vessels and capillaries.  The vessels of this fluid do not have a pumping apparatus like the heart. In its place, there are vessels of the fluid with valves in one way fashion and the motion of the muscles pump the fluid. Simply put, there are vessels for this fluid equivalent in number to the vessels and capillaries of blood.

The fluid running through its vessels would finally reach the lymph node which is 100 in number in our body. These nodes filter the fluid by removing debris and alien cells from it and it also contains white blood cells (WBCs) in large numbers. When somebody gets infected, these nodes would swell while WBC’s works tirelessly to fight the alien cells behind the infection.  The fluid once filtered moves back to the blood stream through certain points.

Functions of Lymph

  1. 1. Cells of the body are kept moist by the aid of this fluid.
  2. It helps in maintaining the blood volume in the body as whenever such conditions occur, the fluid rushes from the systems where they are present to the vascular system of blood.
  3. It helps in transportation of plasma protein macromolecules that are synthesized in liver cells along with hormones produced by the endocrine glands to the blood. The molecules of these elements would not be able to pass through blood capillaries that are narrow but could move swiftly through the lymphatic capillaries.
  4. The fluid transports and absorbs fat and fat-soluble vitamins from the intestine. Lacteals present in the intestinal villi help in assisting the process of absorption and transportation of fat.

From the above discussion, one could easily point out that lymph systems are an integral part of human physiology and that is exactly the reason why it should be given its due credit by students owing to its sheer importance in guarding the human body like none other.

Practise This Question

lf all the particles of a system lie in a cube, is it necessary that the centre of mass be in the cube?