Question

friends please answer the questions please please.....
please do it as soon as possible ​

Answer 1

Answer:

1. When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
2. Carbon dioxide is the gas needed to be removed during exhalation. CO2 need to be exhaled because it's excess concentration prevents the binding of oxygen with haemoglobin and thus causing problem. Hence it is released.
3. Inhaled air is by volume 79% nitrogen, 20.95% oxygen and small amounts of other gases including argon, carbon dioxide, neon, helium, and hydrogen. The gas exhaled is 4% to 5% by volume of carbon dioxide, about a 100 fold increase over the inhaled.
4. Inhaled air is by volume 79% nitrogen, 20.95% oxygen and small amounts of other gases including argon, carbon dioxide, neon, helium, and hydrogen. The gas exhaled is 4% to 5% by volume of carbon dioxide, about a 100 fold increase over the inhaled amount. ... 13.6–16.0% oxygen. 4.0–5.3% carbon dioxide.

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