White Blood Cells T-cells and B-cells ( Cells of the immune system )

Saturday, February 15, 2020

White blood cells and the cells of the immune system.

How does your immune system fight disease?

The skin is an amazing line of defense against pathogens. If this protective barrier is broken then your next lines of defense springs into action.
The first part of the immune system that meets invaders like bacteria is a group of proteins called the complement system. The complement system consists of a number of small proteins found in the blood. 
When the complement system detects a pathogen, signals are sent out to the phagocytes.
This is a group of immune cells specialized in finding and "eating" bacteria, viruses, and dead or injured body cells. The macrophages respond to invaders and start to engulf or destroy the pathogens in several different ways. Macrophages also play a key part in alerting the rest of the immune system of invaders.

There are two main types of lymphocytes, the T cells, and the B cells
T cells come in two different types. They are named T cells after the thymus, an organ situated under the breastbone. T cells are produced in the bone marrow and later move to the thymus where they mature.

Helper T cells are the major driving force and the main regulators of the immune defense. Their primary task is to activate B cells and other T cells. The T cell is specialized in attacking cells of the body infected by viruses and sometimes also by bacteria. The B Cells become activated after receiving proteins from helper t cells.B-cells produce antibodies. When attached, the antibodies serve as an appetizing coating for eater cells such as the macrophage. Antibodies also neutralize toxins and prevent viruses from infecting new cells.

The Memory Cells are the second cell type produced by B cells. The memory cells help remember the pathogens which help fight the pathogen the next time the body is invaded.


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