EVERYDAY SCIENCE

Detailed explanation-1: -Answer: Blood travels at three feet per second when it leaves the heart, but it slows down as it gets into smaller arteries and capillaries. It takes a minute to get around the body. Answer: Five quarts of blood per minute are transported around the body.

Detailed explanation-2: -Did you know? The body has 60, 000 miles of blood vessels. This is long enough to circle the globe more than twice. It takes a red blood cell less than a minute to move from the heart, through the body, and back to the heart.

Detailed explanation-3: -Normal Output. It’s different for different people, depending on their size. Usually, an adult heart pumps about 5 liters of blood per minute at rest. But when you run or exercise, your heart may pump 3-4 times that much to make sure your body gets enough oxygen and fuel.

Detailed explanation-4: -Answer and Explanation: The blood velocity is fastest at the aorta. The velocity of blood is inversely proportional to the cross-sectional area of the blood vessels.

Detailed explanation-5: -Blood comes into the right atrium from the body, moves into the right ventricle and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle and out to the body’s tissues through the aorta.