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Because a hormone testosterone secreted only in males is also responsible for stimulation of hormone erythropoetin secreted from kidneys. Erythropoetin is responsible for synthesis of rbcs. So males have higher hematocrit than that of females.

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14y ago
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5mo ago

Males generally have more blood than females because they tend to have larger overall body sizes and higher muscle mass, which require more blood to transport oxygen and nutrients efficiently. Additionally, testosterone, a hormone found in higher levels in males, stimulates red blood cell production.

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13y ago

this is due to 2 reasons-

1-females have a hormone estrogen-which has an inhibitory effect on erythropoetin-a hormone essential for erythropoeisis.

2- in males,the testosterone has an accelerating effect on erythropoetin..thereby increasing the rbc count slightly.

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14y ago

It has been shown that testosterone affects the secretion of erythropoietin (EPO) by the kidney. EPO is responsible for the formation of red blood cells. Higher testosterone in males means more red blood cell formation and hence a higher hematocrit.

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11y ago

due to testosterone hormone which stimulate the production of erythropoietin which in larger amounts increases RBC production.

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14y ago

Males are generally bigger than females, and with a bigger percentage of muscle, so male bodies can hold more blood on account of being bigger.

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12y ago

a man have too much of energy and strength but his heart is less stronger while we are comparing with woman, so they have higher count.

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9y ago

The most likely reason that male RBC counts are higher than female RBC counts is menstruation. Women of childbearing age lose a portion of their RBCs monthly.

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14y ago

It is because a woman menstruates.  A normal haemoglobin count for women is about 12 to 14, whereas the normal count for a man is from 14 to 16.

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Q: Why do males have more blood than females?
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