Write a big note on white blood cells.
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WHITE BLOOD CELLS
White blood cells (also called leukocytes or immune cells) are cells which form a component of the blood.
They help to defend the body against infectious disease and foreign materials as part of the immune system.
Function of blood--
Transports oxygen, nutrients, metabolic waste products.
Regulation of body temperature, signal transmission, acid-base homeostasis, and immune response.
White blood cells (WBCs) are a part of the immune system that helps fight infection and defend the body against other foreign materials. Different types of white blood cells are involved in recognizing intruders, killing harmful bacteria, and creating antibodies to protect your body against future exposure to some bacteria and viruses.
Conditions With Low White Blood Cell Counts
Conditions which may result in a low white blood cell count include:
Severe infections
Bone marrow damage or disorders including aplastic anemia, bone marrow "takeover" by blood cancers or metastatic cancer, or drug or chemical-related damage to the bone marrow
Autoimmune diseases such as lupus
Splenic "sequestration" where white blood cells are accumulated in the spleen.
Symptoms of a Low White Blood Count
The symptoms of a low white blood count can be understood by knowing the function of white blood cells. Our white blood cells are our bodies defense against infections. Some of the cells are part of our innate immune system, meaning they know from birth to attack foreigners, and others are part of our humoral, or learned the immune system, and manufacturer antibodies after "seeing" a germ in order to be prepared for another attack by that germ ahead of time. Symptoms of infection may include:
Fever
Cough
Pain or frequency of urination
Blood in the stools
Diarrhea
Redness, swelling, or warmth in a region of infection
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