Question 9

The percentage of a female's blood volume composed of red blood cells is 40%.

In females, approximately 40% of blood volume consists of red blood cells, a measure known as hematocrit. This percentage is a key indicator of overall health and oxygen-carrying capacity.

A) 10%

This option is incorrect as 10% is significantly lower than the normal range for red blood cell volume in females. Such a low percentage would indicate severe anemia or other health issues.

B) 25%

While 25% is closer than option A, it still falls short of the typical hematocrit levels for females. This percentage does not accurately reflect the average composition of blood in healthy adult females.

C) 40%

This is the correct answer, as the average hematocrit for females is approximately 40%. This reflects a healthy balance of red blood cells necessary for efficient oxygen transport in the body.

D) 70%

This option is incorrect as 70% is excessively high for red blood cell volume in females. Such a level would be indicative of a pathological condition rather than a normal physiological state.

Conclusion

The correct answer is 40% because it accurately represents the average volume of red blood cells in female blood. Options A, B, and D fail to reflect the normal hematocrit levels, which are crucial for maintaining adequate oxygen delivery and overall health. Understanding these percentages is essential in medical assessments and evaluations of blood health.