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- Blood : The body fluid that circulates in the vascular system (i.e., blood vessels). Whole blood includes plasma and blood cells.
- Hemoglobin : Iron-containing allosteric protein in erythrocytes of vertebrates, consisting of about 6 percent heme and 94 percent globin; also the clinical measurement of hemoglobin per volume of whole blood, varying with age and sex
- Erythrocyte indices : A set of three clinically useful parameters calculated from measurements of erythrocytes, usually reported with a complete blood count
- Mean corpuscular volume : The total volume enclosed by the average circulating erythrocyte (i.e., red blood cell)
- Mean corpuscular hemoglobin : Weight of hemoglobin per erythrocyte, measured in picograms
- Mean corpuscular hemoglobin concentration : The amount of hemoglobin relative to the size of the erythrocyte, reported in grams per deciliter
- Anemia : A condition characterized by insufficient circulating and effective hemoglobin in blood to support normal physiology.
- Bone marrow : The soft tissue, inside the hollow cavities of bones, which produces blood cells
- Hemosiderosis : Add brief definition or description
- Leukocyte : Colourless cells of the immune system which defend the body against both infectious disease and foreign materials, and grouped into neutrophils, eosinophils, basophils, lymphocytes, and monocytes.
- Platelet : Cell fragments circulating in the blood.
- Polycythemia vera : Medical condition characterised by enlargement of the spleen, and the increased number and volume of red blood cells by the bone marrow.
- Stem cell : Describes cells that have the potential to differentiate to new cell types; usually encompasses totipotent, pluripotent and multipotent cells.