What is role of white blood cells in the blood?
1 Answer
Jan 10, 2017
White blood cells of our body provide us IMMUNITY .
Explanation:
WBCs participate in both innate immunity and active immunity.
- WBCs can attack and engulf invading microbes by phagocytosis.
- WBCs can accumulate in an area of inflammation by a process called diapedesis.
- Phagocytic WBCs display the microbial antigens on cell membrane so that circulating lymphocytes become exposed to them and such lymphocytes will eventually mature to fight specific antigens.
- Mature B lymphocytes secrete antibodies in plasma which provide us all time active immunity. Antibodies are also secreted with milk, saliva, etc.
( Antibodies present in mother's milk provide passive immunity to the new born. )
- Mature T lymphocytes fight to provide cell mediated immunity.
- Exposed WBCs are also retained as memory cells, which can proliferate to fight all subsequent infections by the same microbe.
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