Biology, 29.07.2019 18:00 smortandsons

Describe the structures involved in gas exchange in the lungs and explain how gas exchange occurs

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Gas exchange is where your body take in oxygen and gets rid of the carbon dioxide waste that produced.

There is a lot of different structures that are involved in gas exchange. This includes larynx, trachea, bronchus, bronchiole and alveolus.

The process of gas exchange mostly happens between the alveolus (air sac) and the blood capillaries. It occurs because of the concentration gradient between the air sac and the blood capillary. When you breathe in, the air contains a lot of oxygen, so the alveolus has a high concentration of oxygen that drives the diffusion of oxygen from the alveolus to the blood capillaries. The blood capillaries then transport the oxygen to other body parts.

This applies same for the carbon dioxide, the carbon dioxide in the blood capillary is high, therefore it'll diffuse into the alveolus down the concentration gradient, then, we breathe out.

So gas exchange basically occurs because of the concentration gradient of oxygen/carbon dioxide between the alveolus in lungs and the blood capillaries surrounded.

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these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.

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Describe the structures involved in gas exchange in the lungs and explain how gas exchange occurs...

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