التخصص: ارتفاع ضغط الدم
السؤال: لماذا كريات الدم الحمراء نسبتها عند malesاكثر من females؟ 
الجواب: Males generally have larger bodies, and more muscle mass. The higher demand for oxygen is met by a higher RBC count. Additionally, the male hormone, testosterone, also stimulates production of RBCs.

