Your heart is actually located in this part of your body

These carry blood AWAY from your heart.

These contain hemoglobin, which contain oxygen.

The human heart has how many chambers?

These carry oxgenated blood BACK to the heart.

This is the largest artery in your body.

These are what keeps blood flowing in one direction in and out of the heart.

The average human resting heart rate is how many beats per minute?

This is the only organ to receive a constant supply of blood.

These cells are what attack infection in the body.

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