Why do men have a higher hematocrit?

Question:

Why do men have a higher hematocrit?

Constituents of Blood:

Whole blood is composed of 55% blood plasma and 45% formed elements. Blood plasma is composed of 91.5% water, 7% proteins, and 1.5% other solutes such as electrolytes, nutrients, gases, and waste products. Formed elements are composed of platelets, red blood cells, and white blood cells.

Answer and Explanation: 1

Hematocrit is the percentage of the total blood volume occupied by red blood cells. The normal range of hematocrit for female adults is 38-46% and 40-54% in adult males. Testosterone stimulates the synthesis of erythropoietin (EPO), which is the hormone that stimulates the production of red blood cells. Males produce more testosterone than females, thus produce more red blood cells through erythropoiesis.


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Hematopoiesis: Definition & Process

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Chapter 16 / Lesson 16
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Understand hematopoiesis and where the hematopoiesis process produces red blood cells in the embryo and bone marrow. Learn the process and types of hematopoiesis.


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