Question

PLEASE MATES HELP ME WITH THESE QUESTIONS...THEY ARE SOME DIFFICULT FOR ME TO UNDERSTAND...NO IRRELEVANT ANSWERS OTHERWISE REPORTED...​

Answer 1

Answer:

Are u in exam??

I am ur teacher

Answer 2

1. As air passes through the nasal cavities it is warmed and humidified, so that air that reaches the lungs is warmed and moist. The Nasal airways are lined with cilia and kept moist by mucous secretions.
2. Oxygen passes quickly through this air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled.
3. When you inhale, muscles increase the size of your thoracic (chest) cavity and expand your lungs. This increases their volume, so pressure inside the lungs decreases. As a result, outside air rushes into the lungs. That's because a gas always flows from an area of higher to lower pressure.
4. As the diaphragm contracts, it increases the length and diameter of the chest cavity and thus expands the lungs. The intercostal muscles help move the rib cage and thus assist in breathing. The process of breathing out (called exhalation or expiration) is usually passive when a person is not exercising.
5. anaerobic respiration takes place in muscles of human beings. this happens when we do a more amount of physical work. and sometimes sufficient amount of oxygen is unable to reach the muscles hence anaerobic respiration occurs in muscles and lactic acid is formed.
6. Plants give out carbon dioxide not only at night but during the day too. It happens because of the process of respiration in which plants take in oxygen and give out carbon dioxide. As soon as the sun rises another process called photosynthesis starts, in which carbon dioxide is taken in and oxygen is given out.

hope it may help you Nishu behena..

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