An exercising horse with a respiration rate of 16 and a pulse rate of 56 pumps how many liters of blood per minute?

To determine how many liters of blood an exercising horse pumps per minute, you can use the formula that estimates cardiac output, which is the volume of blood the heart pumps in one minute. This is generally calculated by multiplying the horse's pulse rate (heart rate) by the stroke volume (the amount of blood pumped with each heartbeat).

In this case, the pulse rate of the horse is 56 beats per minute. For an average horse, the stroke volume is typically around 1 liter per beat. When you multiply the pulse rate of 56 beats per minute by the average stroke volume of 1 liter, you get a result of 56 liters per minute.

This calculation indicates that the horse pumps approximately 56 liters of blood every minute during exercise, which aligns with the provided answer. Understanding this relationship helps in assessing the cardiovascular efficiency of the horse during physical activity.