I want to know the answer to the following question:
Which sex tends to have more red blood cells than the other?
All the background I'm provided with is that "Sex differences are apparent as males tend to develop "larger hearts and lungs, higher systolic blood pressure, a lower resting heart rate, a greater capacity for carrying oxygen to the blood, a greater power for neutralizing the chemical products of muscular exercise, higher blood hemoglobin and more red blood cells".". Is that enough to answer the question?