The __________ system is made up of the lungs and the passageways that lead to them.

• respiratory
• circulatory
• nervous
• digestive

Oxygen enters the body through the _______ or ________.

• ears or mouth
• nose or ears
• mouth or nose
• eyes or ears

Air travels through the ______ to the lungs.

• diaphragm
• trachea
• arteries
• neurons

The ______ is a muscle that helps the lungs breathe the air in and out.

• esophagus
• trachea
• heart
• diaphragm

The respiratory system is responsible for bringing ______ into your body and removing ______ from your body.

• hydrogen; carbon dioxide
• hydrogen; oxygen
• carbon dioxide; oxygen
• oxygen; carbon dioxide

The ______ system consists of the heart and blood vessels.

• digestive
• circulatory
• respiratory
• skeletal

______ carry the blood away from the heart and ______ carry blood to the heart.

• Neurons; Arteries
• Neurons; Veins
• Arteries; veins
• Veins; arteries

How many minutes does it take for the blood to circulate throughout the body?

• 1-2 min
• 2-3 min
• 3-4 min
• 4-5 min

The ______ works with other body systems to help organisms respond to stimuli.

• digestive system
• respiratory system
• muscular system
• nervous system

Nerve cells are called ______.

• veins
• arteries
• neurons
• stimuli

Tags

NGSS.MS-LS1-8