Hematocrit (Blood Test) Glossary of Terms

The following are health and medical definitions of terms that appear in the Hematocrit (Blood Test) article.

Abnormal: Outside the expected norm, or uncharacteristic of a particular patient.

Anemia: The condition of having a lower-than-normal number of red blood cells or quantity ...

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Apnea: The absence of breathing (respiration).

Blood count: The calculated number of white or red blood cells (WBCs or RBCs) in a cubic m...

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Blood transfusion: The transfer of blood or blood components from one person (the donor) i...

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Bone marrow: The soft blood-forming tissue that fills the cavities of bones and contains f...

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Cancer: An abnormal growth of cells which tend to proliferate in an uncontrolled way and, ...

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Capillary: A tiny blood vessel that connects an arteriole (the smallest division of an art...

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CBC: A commonly used abbreviation in medicine that stands for complete blood count, a set...

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Cell: The basic structural and functional unit of any living thing. Each cell is a small c...

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Chronic: In medicine, lasting a long time. A chronic condition is one that lasts 3 months ...

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Colon: The long, coiled, tubelike organ that removes water from digested food. The remaini...

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Colon cancer: A malignant tumor arising from the inner wall of the large intestine (the co...

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Complete blood count: A set values of the cellular (formed elements) of blood. These meas...

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Congenital: A condition that is present at birth, whether or not it is inherited.

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COPD: Chronic obstructive pulmonary disease. Any disorder that persistently obstructs bron...

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Cor pulmonale: Heart disease that results from abnormally high resistance to the passage o...

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Dehydration: Excessive loss of body water. Diseases of the gastrointestinal tract that ca...

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Enlarged spleen: Splenomegaly, or an enlargement of the spleen. This condition can occur w...

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Folate: Folic acid, one of the B vitamins that is a key factor in the synthesis (the makin...

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Genetic: Having to do with genes and genetic
information.

Heart: The muscle that pumps blood received from veins into arteries throughout the body. ...

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Heat exhaustion: A warning that the body is getting too hot. The person may be thirsty, gi...

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Hematocrit: The proportion of the blood that consists of packed red blood cells. The hema...

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Hemoglobin: The oxygen-carrying pigment and predominant protein in the red blood cells. He...

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High altitude: Altitude sickness occurs at high altitude. So what is high altitude?

Internal bleeding: Bleeding inside the body that is not seen from the outside. Internal bl...

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Iron: An essential mineral. Iron is necessary for the transport of oxygen (via hemoglobin ...

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Malnutrition: A term used to refer to any condition in which the body does not receive eno...

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Marrow: The bone marrow.

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Oxygen: The odorless gas that is present in the air and necessary to maintain life. Oxygen...

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Polycythemia: Too many red blood cells. The opposite of anemia. polycythemia formally exis...

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Pregnancy: The state of carrying a developing embryo or fetus within the female body. Thi...

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Pregnant: The state of carrying a developing fetus within the body.

Pulmonary: Having to do with the lungs.

Pulmonary fibrosis: Scarring throughout the lungs that can be caused by many conditions, s...

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Red blood cells: The blood cells that carry oxygen. Red cells contain hemoglobin and it is...

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Red cells: Short for red blood cells, the oxygen/carbon dioxide carrying cells in blood. A...

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Serum: The clear liquid that can be separated from clotted blood. Serum differs from plas...

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Sickle cell anemia: A genetic blood disease due to the presence of an abnormal form of hem...

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Sleep: The body's rest cycle.

Sleep apnea: The temporary stoppage of breathing during sleep, often resulting in daytime ...

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Spleen: An organ that is located in the upper-left part of the abdomen, not far from the s...

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Transfusion: The transfer of blood or blood products from one person (the donor) into the ...

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Trauma: A physical or emotional injury.

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