The skeletal system = Bones
1. Put a check mark () next to the answer that is most correct.
a) Why is it important that bones are hard?
A to give our body support
O B to keep our muscles strong
O C to give us support and protection
O D so it is easier to make red blood cells
b) Bone marrow is the third inside layer of bone. What does bone marrow do?
A give our body strength
O B protects the rest of the bone
O C creates red blood cells
O D creates calcium
c) What is the skeletal system made of?
Abones and muscles
OB bones
O C bones and veins
O D bones and the brain