Body Systems

Draw the main organ in the circulatory system.

How many bones are in the human body?

• 20

• Over 200

• Under 100

• Over 600

The lungs belong to which system?

• Nervous

• Muscular

• Digestive

• Respiratory

There are _____ main kinds of muscles.

• Two (2)

• Over 600

• Three (3)

• Over 200

Which two (2) body parts are made of cartilage?

• Eyes

• Ears

• Fingers

• Nose

True or False: Involuntary muscles are muscles that you decide to move.

• True

• False

What is the main organ in the nervous system?

• The brain

• The heart

• The liver

• The lungs

The skeletal system consists of what?

• Bones

• Cartilage

• Joints

• All of the above

Circle the part of the body where the digestive system starts.

The respiratory systems takes in ______ and sends out ______.

• carbon dioxide, oxygen

• helium, carbon dioxide

• oxygen, carbon dioxide

• oxygen, carbon monoxide