Closing of the atrioventricular values and blood hitting against the valves.
Answer:
here's the answer what u want
Answer:
Insomnia is a sleep disorder
Explanation:
You may have trouble falling and staying asleep.
Stress. or stress in the following work, school and health.
can cause insomnia.
(Sorry if this is short. But i do hope this helps.)
Answer:
When you exercise regularly, your bone adapts by building more bone and becoming denser. This improvement in bone requires good nutrition, including adequate calcium and Vitamin D. Another benefit of exercise is that it improves balance and coordination.
Explanation:
