Synovial fluid is secreted by

Muscles are attached to bones by

How many ribs are present in human body ?

Which is the smallest bone in the human body ?

The cells responsible for bone formation are

The outer strong layer which covers the bone is called

Earthworms move with the help of body muscles and

11^th and 12^th ribs are called as

How many bones are present in human skeleton ?

Which one of the following is an example for flat bone ?