Skeleton II

The human body has a skeleton.

Write the name for the bones of the skeleton at label (a), (b), (c), and (d).

Why human are vertebrates?
Humans are vertebrates because they have a ​ _______. ​

• skull

• leg bones

• backbone

• hip

Describe how the muscles move the bones.

When the arm bends, the bicep ______ and ​ pull on the bone.

Which of the following animals are vertebrates?

• Lizard

• Rhino

• Lady Bug

• Worm

• Fox

Which of the following animals are invertebrates?

• Lizard

• Rhino

• Lady Bug

• Butterfly

Some animals have a skeleton on the outside of their body.

What is the name of this skeleton?

• exoskeleton

• vertebrate

• herbivore

• endoskeleton

One function of the skeleton is to help animals move.

Select two other functions of the skeleton.

• To help protect important organs in the body

• To help us laugh

• To help us smile

• To help support the body and give it shape.

Muscles work in pairs to move bones.

select one answer that describes how muscles move bones in the body.

• one muscle contracts and the other muscle relaxes

• one muscle stretches and the other muscle relaxes

• both muscles contract at the same time

• both muscles relax at the same time

Mike finds this identification key on the internet. Which bird in the key has a bent beak?

• spoonbill

• ibis

• flamingo

• great egret

Mike finds this identification key on the internet. Which bird in the key has a long thin beak?

• great egret

• flamingo

• snowy egret

• ibis