Question

which material is present at the end of bones in a joint. how does it help

Answer 1

The end of bones of joints are covered by fibrous connective tissues known as cartilage. Cartilage are fibrous rubbery connective tissues that cover the end of bones in joints and prevent the bones from wearing out. The cartilage protects the bones from friction that would cause wearing out due to the rubbing against each other.

Answer 2

Soft tissues called cartilage are present at the end of bones in a joint to reduce the friction between the bones and make movement easier. Such joints are called as Cartilaginous joints.  These are made of a band of cartilage that binds bones together. Example- joints between the ribs and costal cartilage,  inter vertebral disks of the spine.