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What does a hematocrit measure in a blood sample?
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17. The Blood
Introduction To Blood
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What gives rise to all the formed elements of the blood?
A
Hematopoietic stem cells
B
Lymphocytes
C
Platelets
D
Erythrocytes
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Understand that the formed elements of the blood include erythrocytes (red blood cells), leukocytes (white blood cells), and platelets.
Recognize that all these formed elements originate from a common progenitor cell type known as hematopoietic stem cells (HSCs).
Hematopoietic stem cells are multipotent, meaning they have the ability to differentiate into various types of blood cells.
These stem cells reside primarily in the bone marrow, where they undergo a process called hematopoiesis to produce the different blood cell types.
Different pathways of differentiation from hematopoietic stem cells lead to the formation of specific cell types: erythropoiesis for erythrocytes, leukopoiesis for leukocytes, and thrombopoiesis for platelets.
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