The Respiratory System for Kids Quiz

What is the main purpose of the respiratory system?

• To digest food

• To bring oxygen into your body

• To filter waste from the blood

• To pump blood

Which human organ is known to float on water?

• Liver

• Brain

• Heart

• Lungs

What happens when you yawn?

• Your body takes in more oxygen

• Your muscles relax

• Your heart rate slows down

• Your body cools down

What is the role of the diaphragm in breathing?

• It helps you breathe

• It absorbs oxygen

• It pumps blood to the lungs

• It filters the air

Where does the exchange of oxygen and carbon dioxide take place?

• In the bronchi

• In the heart

• In the alveoli

• In the trachea

What is the process called by which carbon dioxide is produced in your cells?

• Osmosis

• Diffusion

• Filtration

• Respiration

How many alveoli are inside a person's lungs to help with the exchange of gases?

• About 600 thousand

• About 600 million

• About 60 million

• About 6 million

What is the pharynx another name for?

• Your throat

• Your mouth

• Your windpipe

• Your nose

True or False: The process where oxygen from the air and carbon dioxide from the cells is exchanged is called diffusion.

• True

• Partially true

• False

• Not mentioned

What causes hiccups according to the text?

• Sudden movements of the diaphragm

• Eating too slowly

• Drinking water

• Running