Question

Differentiate the nature of skin in five classes of chordates.

Answer 1

in picses
the skin of fishes is covered with scales and gills of Pisces are covered with Bony plates named as opercula

in amphibia
their skin is smooth , slimy , and brightly coloured .. its skin is slippery due to secreation of glands directly under the skin.

in reptilia
skin of reptiles is surely dry covered with epidermal scales

in aves
the body of aves is covered with feathers and wings

in mammalia
in the members of class mammalia their skin has some glands like mammary glands which secret milk in females and scent glands, sebaceous glands and sweet glands

Pisces amphibia and reptiles are cold blooded ......and aves and mammalia are warm blooded.

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Answer 2

The skin known as the Integumentary System is, in fact, the largest organ of the body. It has a complex structure, being composed of many different tissues performing many functions that are important in maintaining homeostasis in the body. Probably the most important of these functions is the control of body temperature. The skin also protects the body from physical damage and bacterial invasion. The skin has an array of sense organs which sense the external environment, and also cells which can make vitamin D in sunlight.

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