Respiration in Aquatic Animals
Respiration in Aquatic Animals
Respiration in Aquatic Animals:
Respiration is the process of breakdown of food material in the presence or absence of oxygen gas. Aquatic organisms use the dissolved oxygen of water for the breakdown the food material. The rate of breathing is more in aquatic organisms than that of the teresstial organisms. There are many organisms that live in water. Some of them have gills and some have other organs for breathing. Some of the examples are :
Breathing in Fish: The respiratory organs in fish are the gills. Fishes take in oxygen in dissolved form. Duriing respiration, water enters the body throught the mouth, and then passes through the gills and comes out of the operculum. The gills take in the oxygen dissovled in the water and give out carbon dioxide.
Dolphins and Whales : These animals do not possess gills for respiration. These possess nostrils which are called blow holes.These organisms breath in through their nostrils and lungs. Dolphins and whales comes to the surface of sea water form time to time to breath in air.
Humans cannot survive under water because they do not possess any gills to make use of oxygen dissolved in water for breathing.
Respiration through gills is known as | |||
| Right Option : B | |||
| View Explanation |
Gills are for | |||
| Right Option : B | |||
| View Explanation |
Which of the following are correct ? (a) The respiratory organs in fish are the gills. (b) Dolphins and whales come to the surface of sea water form time to time to breath in air. (c) Human can survive under water because they do not possess any gills to make use of oxygen dissolved in water for breathing. | |||
| Right Option : A | |||
| View Explanation | |||
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