ICSE Class 7 Answered

Exoskeleton

Backbone

• It is the external skeleton present on the outside of an animal as a hard outer coating.

• It is the internal skeleton present inside the body.

• It is made up of scales, chitinous cuticle and calcified shells.

• It is made up of vertebrae.

• It is mainly found in arthropods (insects, spiders, crabs, centipedes, millipedes etc)

• It is found in vertebrates.

• It provides an attachment site for the wings through muscles.

• It provides sites for the attachment of muscles.