Respiration and Circulation Quiz

What is the main organ of the respiratory system?

• Lungs

• Stomach

• Liver

• Heart

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

• Stomach

• Esophagus

• Alveoli

• Bronchi

Name the parts of the respiratory system that help in the exchange of gases.

• Bronchioles

• Epiglottis

• Trachea

• Alveoli

What gas do we breathe in?

• nitrogen

• carbon dioxide

• oxygen

• hydrogen

What gas do we breathe out?

• Nitrogen

• Carbon dioxide

• Hydrogen

• Oxygen

What is the main organ of the circulatory system?

• Liver

• Kidney

• Heart

• Brain

What is the function of the heart in the circulatory system?

• To filter air

• To pump blood

• To regulate body temperature

• To digest food

What is the name of the process where blood is pumped around the body by the heart?

• ventilation

• digestion

• excretion

• circulation