Review. Unit 1: Living Things

What is a skeleton?

Look at the picture. Mention the parts of the skeleton based on the numbers in order.

Our skeletons are made of ___ bones.

Mention 4 main jobs or function of the skeleton.

Which function of the skeleton matches the following statement?

"Our muscles work together with our skeletons so we can walk."

Complete the the sentences with the correct answers.

Muscles always work in _____.

When muscles _____, they get longer

When muscles contract, they get _______.

Animals with skeleton inside their bodies are called ___________.

Mention 5 groups of vertebrates.