Woman holding basketballNever postpone supporting your bones. Calcium keeps you in the no-break zone

Study hint: Learning vocabulary 

osteo – means bone (from Greek osteon ‘bone’). If you see a word containing “osteo”, it will have something to do with bones.


vertebrate – comes from a Latin word ‘vertere’ (vertebratus) meaning joint of the spine. meaning ‘to turn’. The plural of vertebra is vertebrae (as in the original Latin)


invertebrate – means unable to turn (lacking a back bone/vertebral column) (‘in’ is a prefix meaning not)


exoskeleton – means a skeleton on the outside (‘exo’ means outside)


Who has a skeleton?

All vertebrates have a skeleton.

Invertebrates have an exoskeleton that is on the outside of the body.


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