The bones at the joints are held together by ___________________

In the skeleton the hard part which is the internal support of the structure is called an ________________ .

A  _______________ is a vertebrate it has a long backbone which is very flexible.

The skeleton of a human body that is inside the body is known as ___________________ .

Birds fly with their wings which are modified _______________ .

Earthworms have _______________  skeletons.

Identify A, B and C in the table given below.

Birds can fly, because  _________________

A cord of dense tissue that connects a muscle to a bone is a ______________

Which of the following are correct ?

(a) The skeleton of a human body is inside the body. Such a skeleton is known as endoskeleton. Fish, amphibians, reptiles, birds and mammals have endoskeletons. 

(b) A snake is a vertebrate. It has a long backbone which is very flexible. The snake can curve its body into many loops.

(c) The bones of the birds are hollow and very light, making it easy for them to rise in air.