Early doctors did not understand that blood flowed in a circuit. Instead, they assumed that blood ebbed and flowed like a tide in the body. William Harvey was the first to demonstrate the circulation of blood and convince the medical community. Which of the following observations would be evidence that blood was pumped through the body or flowed in a circuit?
A) Dissecting a live fish shows the heart beating and blood moving, gushing one direction.
B) A very tight tourniquet causes the arteries to swell on the side toward the heart, but not on the side of the ligature away from the heart.
C) Measuring the volume of the heart and counting the beats per minute gives a value of 520 pounds of blood an hour, many times a person's volume.
D) In surface veins, blood can be pressed past a valve toward the heart but not away from the heart.
E) A cut made anywhere on the body results in blood seeping from the wound.

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The Answer of Early doctors did not understand that blood flowed in a circuit. Instead, they assumed that blood ebbed and flowed like a tide in the body. William Harvey was the first to demonstrate the circulation of blood and convince the medical community. Which of the following observations would be evidence that blood was pumped through the body or flowed in a circuit?
A) Dissecting a live fish shows the heart beating and blood moving, gushing one direction.
B) A very tight tourniquet causes the arteries to swell on the side toward the heart, but not on the side of the ligature away from the heart.
C) Measuring the volume of the heart and counting the beats per minute gives a value of 520 pounds of blood an hour, many times a person's volume.
D) In surface veins, blood can be pressed past a valve toward the heart but not away from the heart.
E) A cut made anywhere on the body results in blood seeping from the wound.

Early Doctors Did Not Understand That Blood Flowed in a Circuit