Types of skeletons

There are three types of skeleton

• Hydrostatic skeleton

Here support is provided by a fluid under pressure and it is found in round worms, earthworm.

• Exoskeleton

It is made of a hard cuticle protecting inner delicate tissues and also provides attachment for muscles

• Endoskeleton

It occurs in vertebrates, made of bone and cartilages.

It is internal and the muscles are attached to it