Final answer:
The typical percentage of blood a healthy heart ejects is around 55-70 percent.
Step-by-step explanation:
The ejection fraction is the percentage of blood that the left ventricle ejects upon contraction. It is a measure of the heart's pumping efficiency. Normally, the ejection fraction ranges from approximately 55-70 percent, with a mean of 58 percent.
This means that for a healthy heart, around 55-70 percent of the blood in the left ventricle is pumped out with each contraction. Factors such as exercise, maximum cardiac output, and individual variations can affect the ejection fraction. SO therefore the typical percentage of blood a healthy heart ejects is approximately 55-70%, with a mean of 58%.