Answer:
After about age 40 to 50, the body starts to break down bone mass faster than it builds it.
Explanation:
This is part of the natural aging process. Both men and women experience bone loss with age.
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Answer:
Smoking makes the airways become swollen, narrow, and filled with sticky mucus — the same problems that cause breathing trouble in people with asthma. For this reason, a smoker who has asthma is more likely to have more frequent and severe flare-ups.
Explanation:
I looked it up
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Answer:
force as atria and ventricles fill with blood
Explanation:
Systolic blood pressure, the top number, measures the force the heart exerts on the walls of the arteries each time it beats. Diastolic blood pressure, the bottom number, measures the force the heart exerts on the walls of the arteries in between beats.
