Hemoglobin vs. Hematocrit

Hemoglobinnoun

The iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body; it consists of a protein (globulin), and haem (a porphyrin ring with an atom of iron at its centre).

Hemoglobinnoun

The normal coloring matter of the red blood corpuscles of vertebrate animals. It is composed of hematin and globulin, and is also called hæmatoglobulin. In arterial blood, it is always combined with oxygen, and is then called oxyhemoglobin. It crystallizes under different forms from different animals, and when crystallized, is called hæmatocrystallin. See Blood crystal, under Blood.

Hemoglobinnoun

a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues;

Hemoglobin

Hemoglobin, or haemoglobin (spelling differences) (from Greek αἷμα, haîma 'blood' + Latin globus 'ball, sphere' + -in) (), abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein in the red blood cells (erythrocytes) of almost all vertebrates (the exception being the fish family Channichthyidae) as well as the tissues of some invertebrates. Hemoglobin in blood carries oxygen from the lungs or gills to the rest of the body (i.e.

Hematocritnoun

(medicine) The percentage (by volume) of packed red blood cells in a centrifuged sample of blood

Hematocritnoun

(medicine) A centrifuge used to analyze the relative amount of red blood cells and plasma in blood

Hematocritnoun

the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit

Hematocritnoun

a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood

Hematocrit

The hematocrit () (Ht or HCT), also known by several other names, is the volume percentage (vol%) of red blood cells (RBC) in blood, measured as part of a blood test. The measurement depends on the number and size of red blood cells.