Question

1. A human body consists of a quadrillion cells.

The human body is _______ 

2. Fifty percent of a bone is made of water.

Water _______ 

3. The speed of a nerve impulse on a reflex arc can reach 120 meters a second.

A nerve impulse _______ 

4. Mixed food usually stays in the stomach of an adult person for about six hours.

The time that _______ 

5. The bronchial tree has 24 levels of embranchment. 

_______ branches out_______ 

6. A male body is somatically and sexually mature when a young man turns 16-19 years of age.

As soon as _______ 

Answer 1

1. The human body is composed of 10¹⁵ cells.
2. Water constitutes 50 percent of bone in the human body.
3. A nerve impulse on a reflex arc can reach a speed of 120 meters per second.
4. The time that the mixed foods can stay around six hours in the stomach of an adult person.
5. Embranchment of the bronchial tree branches out with 24 levels.
6. As soon as a young man turns 16-19 years of age, the male is somatically and sexually matured.