General

Lymphocytes



Lymphocyte: Spherical-core leukocyte type

What are lymphocytes - definition

Lymphocytes are a type of white blood cell (leukocyte) produced in the red bone marrow.

Lymphocyte Function:

- Perform the body's defense against infectious agents (viruses, bacteria, allergenic substances and other hostile bodies that may penetrate the human body).

Main Features:

- They have spherical shape;

- They are mononuclear (presence of only one nucleus);

- They have blue color;

- They have a size between 5 and 8 micrometers;

In the human body of a healthy person there are between 1,000 and 4,000 lymphocytes per milliliter of blood. They are 20 to 30% of total leukocytes. When a person is stressed or depressed this number may fall, weakening their immune system. On the other hand, when a person has an infection, the number of lymphocytes grows, indicating that the immune system is fighting viruses or bacteria.

Lymphocyte Types and Their Functions:

- T lymphocyte - have the function of making blood antibodies, also acting on cellular immunity.

- Lymphocyte B - are responsible for the recognition of antigens (foreign bodies that enter the human body). They produce antibodies against antigens.

- NK (Natural Killers) cells - make up about 10% of lymphocytes present in the blood. They have the ability to attack and destroy cells hostile to the human body.

Biological curiosity:

- To keep our immune system healthy we must: have a healthy and diverse diet (rich in vitamins and minerals), avoid stress, do not smoke, do not abuse alcohol, sleep well and exercise regularly (not being sedentary).