Immune Cell Parade: Count the huge family of immune cells!

Up in the sky, down to the deep sea, viruses and germs everywhere, human beings can reproduce today, this is really lucky, it is not medicine to save us, who is? It's those powerful guards in the body -- immune cells!

Immune cells are one of the many cells in the human body, is the health of the human body, all the time and may threaten your life and health of the bad factors are not compromising the struggle, defend your peace. Immune cells are cells involved in or associated with the immune response. There are many kinds of immune cells in the human body, including neutrophils, macrophages, lymphocytes, antibodies, T lymphocytes, natural killer cells, etc. They perform their own functions and cooperate with each other to jointly resist foreign invasion, and guard our body day and night.

1. Neutrophils

It is the body's first line of defense against microbial pathogens. When foreign bacteria or stimuli enter or harm the body, the body reacts (inflammation) by rapidly accumulating neutrophils at the site of inflammation and killing them as they devour the bacteria (the dead white blood cells, if they are on the body surface, are the pus you see).


2. Macrophages

Macrophages mainly phagocytosis and digestion of cell fragments and pathogens, and can also activate lymphocytes or other immune cells to make them respond to pathogens.


3. T lymphocytes are an important part of immune cells and the body's valiant fighters against disease and infection.

There are two main effector forms of T lymphocyte immunity:

① Bind to target cells, destroy their cell membranes and kill target cells;

② Release lymphokine, expand and enhance immune effect.


4. Natural killer cells

The third group of lymphocytes, alongside T and B cells, acts like public security bureau to prevent cancer and virus infection of body cells. NK cells lead to apoptosis by binding to the receptors of target cells, and promote the generation of new cells to balance organ and immune system functions.

Everyone has tumor cells in their body, about 10,000 of them. In general, when the immune system is normal, and the immune system is strong, they don't form tumors, because there are natural killer cells that protect the body.

Immune cells can not only resist, destroy the invading bacteria, but also eliminate their own decay, cancer cells.