Guide Questions:
1. Why should you take care of the respiratory and circulatory system?

1. Taking care of these systems would ensure smooth cellular metabolism.

2. It would reduce the risk of heart diseases.

3. It would help in the maintenance of the right pH for the blood.

4. It would allow for the easy removal of the waste products from the body.

Explanation:

The respiratory system refers to the series of processes that begin with the inhalation of air and its movement across the blood vessels and eventual discharge from the body. Oxygen which is a very important gas needed to sustain life is inhaled during respiration. It is also circulated through the circulatory system to the cells and tissues that need it.

Taking care of these systems through exercise, rest, and eating the right foods will protect us from diseases that affect them such as Heart attack. Cells would also function well and not die easily because they can access the oxygen needed for them to thrive. The right balance of these gases would also ensure that the proper pH of the body is being maintained.

an aneroid barometer is different from a mercury barometer in that it provides readings that increase as air pressure increases.

hope it : )

it should be d or b but i'm sure it's d