Respiratory System Quiz

What is the main function of the respiratory system?

• Digestion

• Circulation

• Breathing

• Movement

Which organ is responsible for taking in oxygen from the air?

• Heart

• Lungs

• Liver

• Stomach

What gas do we breathe out?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

What part of the body connects the nose to the lungs?

• Esophagus

• Trachea

• Intestine

• Spine

What protects the lungs and helps them expand and contract?

• Skull

• Ribs

• Spine

• Pelvis

What is the name of the tiny air sacs in the lungs where gas exchange happens?

• Bronchi

• Alveoli

• Capillaries

• Veins

Which muscle helps the lungs to breathe in and out?

• Diaphragm

• Biceps

• Heart

• Liver

What happens when we inhale?

• We release carbon dioxide

• Our lungs shrink

• We take in oxygen

• Our heart stops

What happens when we exhale?

• We take in oxygen

• We release carbon dioxide

• Our lungs grow

• We eat food

What part of the respiratory system filters dust and germs from the air?

• Lungs

• Nose

• Diaphragm

• Heart