Question

Explain the breathing under water with a suitable example.

Answer 1

Answer:

Human eyes are pretty complex light-focusing modules. The two main parts that actually focus the light are the cornea and the lens (which is located between the cornea and the back of the eye). The cornea bends the light the most, and the lens fine-tunes the angles. This mechanism seems to work very well in air, so why doesn't it work in water

The fault is that of the index of refraction of the cornea. The reason light bends when it travels from air to the cornea into the aqueous humor is that the index of refraction of air (about 1.0) is much less than that of the cornea (about 1.37). The index of refraction of water is about 1.33, much closer to the index of refraction of the cornea than is the index of refraction of air. To better understand why this closer relationship causes a human cornea to lose a good deal of the refractive power.

Explanation:

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Answer 2

Underwater, a fish's lungs would be useless since one breath would fill them with fluid and leave them useless.

• Fish, on the other hand, need oxygen in order to survive.
• To extract oxygen from the water, they need specialised organs called "gills." Gills are feathery organs with a lot of blood vessels.
• Water enters the mouth of a fish and is driven out via the gill canals.
• When water travels over the thin walls of the gills, dissolved oxygen enters the circulation and goes to the fish's cells.