Which of the following is an organ?

• Heart

• Water

• Sunlight

• Soil

What is the purpose of the analogy in the text?

• To show how schools are different from body systems

• To explain the importance of each body system

• To describe how schools operate

• To compare schools to other organizations

How does hair help the body?

• It helps the body retain heat

• It helps the body digest food

• It helps the body breathe

• It helps the body move

What role does skin play in regulating body temperature?

• It produces energy

• It keeps heat in and sweats to cool off

• It circulates blood

• It digests food

What happens when you get a large cut or scrape?

• It allows bacteria to enter your body

• It helps you breathe better

• It makes you stronger

• It improves your vision

Why is your skin considered special according to the text?

• It changes color.

• It has unique fingerprints.

• It grows hair.

• It can heal quickly.

What is a unique feature of everyone's skin?

• Color

• Texture

• Fingerprint patterns

• Thickness

What does the skeleton help us do besides protecting organs?

• Fly

• Swim

• Stand upright

• Sleep

What is found on the inside of large bones?

• Water

• Bone marrow

• Muscle

• Fat

What happens after a doctor sets a broken bone back into place?

• The bone heals itself.

• The bone becomes stronger than before.

• The bone never heals.

• The bone disappears.