Osmoregulation In Terrestrial Environment Explain In Urdu Hindi | Class 12 Biology

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About This Video ........................
In This Video Lecture You Will Learn Basic Concept Of Terrestrial Animals
The terrestrial habitat lacks both water and salts in the surrounding medium (air), therefore, the terrestrial animals often face the problem of both water and salt losses.
Water loss may be due to evaporation of water from the general body surface or through sweat or through urine.
Salt loss may be due to sweat and urine. This problem can only be solved by remaining in water and salt balance that is by maintaining a balance between water and salt loss and water and salt gain.
Therefore, the terrestrial animals usually drink large amount of water and develop various devices for the conserva­tion of tissue water and feed on such food materials which are rich in salts so that the deficiency of salts may be compensated.
In terrestrial animals such as reptiles, birds, mammals and some crustaceans and annelids, the physiological adaptations to meet the osmotic problem are the following:
(i) For water conservation the body is covered by means of a water proof covering which prevents the evaporation of water from the body.
The water proof body covering may be of horny scales (as in certain reptiles), feathers (as in birds) and hair or fur (as in ma­mmals).
(ii) The loss of water through urine and faeces is checked by various mechanisms. In reptiles and birds the water from the faeces is absorbed by rectum and cloaca.
About This Channel.....................
I make these videos cause I love to draw and connect the complexity of science and medicine into art. I'm not saying. I'm 100% correct in all my videos, but I do try to obtain the information from credible sources.
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