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14 Cards in this Set
- Front
- Back
Describe blood according to its tissue type
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Blood is a connective tissue whose cells are suspended in liquid called plasma.
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Describe major function of blood.
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Functions of blood include transporting substances between body cells and the outside, maintaining homeostasis and protection.
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Define the term hematology
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Hematology is the study of blood, blood-forming tissues and the disorders that affect them.
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Name the average volume of blood in a human.
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Blood volume varies from individual to individual, but the average volume (70 kg male) is 5 liters.
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Name the two major components of blood and the percentage of each by weight.
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Solid cells or "formed elements" (45%), which is composed mainly of red blood cells.
a. Quantitation of this portion of blood represents the hematocrit (HCT) reading or packed cell volume (PCV). Liquid plasma (55%), which contains water, electrolytes, hormones, wastes, proteins and much more |
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Name the three types of human blood cells
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red blood cells, white blood cells, and platelets
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Provide the common and scientific name for each blood cell type.
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Red Blood Cells (RBC) = Erythrocytes
White Blood Cells (WBC) = Leukocytes Platelets = thrombocytes |
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Hemoglobin
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protein (globin) + heme (iron)
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Why do mature cells lack nuclei?
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are anucleate, leaving more room for hemoglobin/oxygen;
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RBC Count
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The number of rbc's/mm3 blood.
Average RCC = 4 million-6 million rbc's/mm3 |
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Average life-span of RBC's
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120 days
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What destroys RBC's
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Liver and spleen macrophages destroy worn rbc's
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Production (Erythropoiesis) of RBC's
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In fetuses = yolk sac, liver, spleen;
In adults = red bone marrow; B12, folic acid, and iron are all needed. |
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Hemoglobin
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Hemoglobin is broken into globin and heme,
Iron in Hb is recycled, Heme is broken into biliverdin > bilirubin > bile. |