|Class 7 Chemistry Fibre to Fabric||Wool|
The hair present in the body of animals traps the air in between the hairy fibres. The trapped air being a poor conductor of heat prevents the flow of heat from their body to the cold surroundings and vice versa thereby makes these animals feel warm.
Wool is obtained from the hairy animals like sheep, goat, yak and many other animals. Coarse beard hair and fine soft under-hair close to the skin are the two types of fibres forming the fleece of these animals.
Fig. Sheep (top left), goat (top right) and yak (bottom)
Some other popularly used wool are as follows: