EVERYDAY SCIENCE

Detailed explanation-1: -In Dogfish (Scoliodon), the skin or integument consists of two layers-an outer ectodermal epidermis and an inner mesodermal dermis. slippery and difficult to catch by predators, minimises friction in locomotion and resists entry of microorganisms into body.

Detailed explanation-2: -Shagreen is the dried skin of shark. They are made from the untanned skin of the shark. This is usually rough in texture. they are used as rawhide for covering the back of the horse or other animals. Shagreen is now commonly made from the skins of sharks and ray fishes.

Detailed explanation-3: -Shagreen is a medium-sized land snail (adult shell width about 1 cm ) with a shell that is depressed, yellow to brown in colour, with three tooth-like denticles in the shell opening and no hole in the middle of the shell where whorls come together.

Detailed explanation-4: -Shagreen is the skin of a shark which is used in making decorative materials.