Old Church Slavonic is the first language written by the Slavs.

Old Church Slavonic is the oldest recorded language of the Slavic group.

He broke his leg bone.

Many ancient bones were found in this ancient ruins.

Bones of ancient people were discovered from this ruins.

The inner slats of this fan are made very finely.

He carefully stores the family's urn.

Ossification is a biological process that refers to the transformation of tissue into bone.

He broke his humerus.

He broke his lower leg bone.