What is the Meaning of White blood cells | Definition and What is White blood cells

From the latin globŭlus, globule is a small spherical body. The term is short for globe and is often used to refer to the cells that make up blood. One can distinguish, in this regard, white blood cells and red blood cells.
White blood cells (also called leukocytes) are the blood cells that are responsible for the immune response by acting in the defense of the body against substances and foreign antigens. Leukocytes, and red blood cells and platelets, together with the components of the blood.
The origin of white blood cells found in bone marrow and lymphatic tissue. In the absence of pigment, they are classified as "white" in order to distinguish them from the red blood cells.
A leukocyte is a mobile cell (comprising between 8 and 20 microns) which is transferred through the pseudopods. It contains a nucleus, mitochondria and other cellular organelles, and it can get out of blood vessels through a mechanism called diapedesis which allows it to extend its cytoplasmic content.
According to the shape of the nucleus, the white blood cells can be divided into lymphocytes, monocytes, neutrophils, basophils and eosinophils. According to the characteristics of colouring, on the other hand, one can speak of granulocytes, neutrophils, agranulocytes or basophils.
It is possible to observe changes in the size, shape and function of white blood cells. These disorders are hereditary diseases, infections or reactions to medications or anemia, for example. Leukocytosis is the increase in the number of white blood cells while the decrease is called leukopenia.
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