Chapter 10

Question 1

Yearly, how many times does your heart beat?

Answer 1

~40 million times

Question 2

Lifetime, how many times does your heart beat

Answer 2

~2.5 billion beats

Question 3

Name the top 5 leading causes of death in the U.S.

Answer 3

1. Heart Disease: (596,577)
2. Cancer: (576,691)
3. Chronic Lower Respiratory Diseases: (142,293)
4. Stroke (Cerebrovascular Disease): (128,932)
5. Accidents (Unintentional Injuries): (126,438)

Question 4

In the circulatory system, how may liters of blood circulate per a day?

Answer 4

7,500 liters (~2,000 gallons)