Blood cell

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Blood cell

A blood cell (also called blood corpuscle) is any cell

Cell

Cell may refer to:...
of any type normally found in blood

Blood

Blood is a specialized bodily fluid that delivers necessary substances to the body's Cell s ? such as nutrients and oxygen ? and transports waste products away from those same cells....
. In mammal

Mammal

Mammals are a class of vertebrate animals whose name is derived from their distinctive feature, mammary glands, with which they feed their young....
s, these fall into three general categories:

Together, these three kinds of blood cells sum up for a total 45% of blood tissue (55% is plasma

Blood plasma

Blood plasma is the liquid component of blood, in which the blood cells are suspended. It makes up about 55% of total blood volume. It is composed of mostly water , and contains dissolved proteins, glucose, clotting factors, mineral ions, Hormone and carbon dioxide ....
).

crease in number of blood cells is called cytopenia

Cytopenia

Cytopenia is a reduction in the number of blood cells. It takes a number of forms:*Low red blood cell count: anemia.*Low white blood cell count: leukopenia or neutropenia ....
.

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Encyclopedia

A blood cell (also called blood corpuscle) is any cell

Cell

Cell may refer to:...
of any type normally found in blood

Blood

Mammal

Mammals are a class of vertebrate animals whose name is derived from their distinctive feature, mammary glands, with which they feed their young....
s, these fall into three general categories:

Red blood cell
Red blood cell

Red blood cells are the most common type of blood cell and the vertebrate body's principal means of delivering oxygen to the body tissues via the blood....
s
White blood cell
White blood cell

White blood cells , or leukocytes , are cell of the immune system defending the body against both infectious disease and foreign materials....
s
Platelet
Platelet

Platelets, or Thrombocyte, are small, irregularly shaped anuclear cells, 2-4?m in diameter, which are derived from fragmentation of precursor megakaryocytes....
s

Together, these three kinds of blood cells sum up for a total 45% of blood tissue (55% is plasma

Blood plasma

Comparison
Cell type Cell type A cell type is a distinct morphological or functional form of cell . When a cell switches state from one cell type to another, it undergoes cellular differentiation....	Primary function	Lifetime
Red blood cell Red blood cell Red blood cells are the most common type of blood cell and the vertebrate body's principal means of delivering oxygen to the body tissues via the blood.... s	transport of oxygen Oxygen Oxygen no O2 produced; 2) O2 produced, but absorbed in oceans & seabed rock; 3) O2 starts to gas out of the oceans, but is absorbed by land surfaces and formation of ozone layer; 4-5) O2 sinks filled and the gas accumulates]]...	120 days
White blood cell White blood cell White blood cells , or leukocytes , are cell of the immune system defending the body against both infectious disease and foreign materials.... s	produces antibodies Antibody Antibodies are gamma globulin proteins that are found in blood or other bodily fluids of vertebrates, and are used by the immune system to identify and neutralize foreign objects, such as bacterium and viruses.... to fight infection	days to years
Platelet Platelet Platelets, or Thrombocyte, are small, irregularly shaped anuclear cells, 2-4?m in diameter, which are derived from fragmentation of precursor megakaryocytes.... s	blood clotting	9 days

Disorders

A decrease in number of blood cells is called cytopenia

Cytopenia

Cytopenia is a reduction in the number of blood cells. It takes a number of forms:*Low red blood cell count: anemia.*Low white blood cell count: leukopenia or neutropenia ....
. An increase, on the other hand, is called polycythemia

Polycythemia

Polycythemia is a condition in which there is a net increase in the total number of blood cells, primarily red blood cells, in the body. The overproduction of red blood cells may be due to a primary process in the bone marrow , or it may be a reaction to chronically Hypoxia or, rarely, a malignancy....
.

External links

from the Genetic Science Learning Center at the University of Utah.