He is a world-renowned osteologist.

He is an expert in osteology.

The penis is a part of the male reproductive system.

This is a human with a special ability.

His artwork has a special charm.

I see dogs in the park every day.

His behavior is really disgraceful.

He explained in detail about the structure of the sphenoid bone.

He slipped and hit his coccyx.

He fractured his intermediate cuneiform bone in his foot.