Bristles are hair like structure, connected with muscles. The bristles help to get a good grip on the ground. ‘ Cavity: It is the hollow space or cavity in one bone, into which the other bone fits. Such joint allows movements in all directions.
Bristles are hair like structure, connected with muscles. The bristles help to get a good grip on the ground. ‘ Cavity: It is the hollow space or cavity in one bone, into which the other bone fits. Such joint allows movements in all directions.