4.1 Skeletal System

The skeletal system includes all your ______ and joints.

• bones

• muscles

• nerves

• veins

Which of the following is NOT a function of the skeletal system?

• Support for your body

• Movement for your body

• Digestion of food

• Protection for your vital organs

The skeletal system is a major source of ______ cell production.

• blood

• nerve

• muscle

• skin

The skeletal system stores ______.

• calcium

• glucose

• oxygen

• vitamin D

Bones are made of water, calcium, living cells, and _______.

• tissue

• sugar

• plastic

• oil

What percentage of bones is made up of calcium?

• 50%

• 10%

• 70%

• 30%

Bones are 50% calcium, 25% water, and 25% _______ which make up the tissues. Fill in the blank.

• living cells

• fatty acids

• bone marrow

• cartilage

How many types of bone tissue are there?

• One

• Two

• Three

• Four

Fill in the blank: Compact Bone Tissue is the ______ layer of the bone. It is dense, smooth, and strong.

• outside

• inner

• top

• central

Fill in the blank: Cancellous Bone Tissue is the ______ layer of the bone. It is spongy and light weight.

• inner

• outer

• middle

• surface