Skeletal and muscular system

1

Where are blood cells made?

2

Which part of the skeleton protects the lungs?

3

What mineral makes bone strong?

4

What are the two bones in the lower arm called?

5

What is the purpose of white blood cells?

6

Which of these is a hinge joint?

7

What is the smooth substance at the end of a bone called?

8

What sort of joint is the hip joint?

9

How are muscles attached to bones?

10

Which two muscles are in your upper arm?