Hematopoiesis

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Week 11 – Blood & Lymphatic System (Laboratory Class)

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Life span of RBCs

100 to 120 days

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  • Developing RBCs divide many times and then begin synthesizing huge amounts of hemoglobin.

Immature RBCs

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  • Suddenly, when enough hemoglobin has been accumulated, the nucleus and most organelles are ejected, and the cell collapses inward.

Reticulocyte

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  • Within 2 days of release, they have rejected the remaining ER and have become fully functioning erythrocytes

Mature erythrocytes

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  • The rate of erythrocyte production is controlled by a hormone called __________

Erythropoietin

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  • accelerates the production of platelets, but little is known about how that process is regulated.

Thrombopoietin