Respiratory and Circulatory Systems Quiz

What is the main organ of the respiratory system?

• Heart

• Lungs

• Stomach

• Kidneys

What happens during inhalation?

• Oxygen leaves the body

• Carbon dioxide enters the body

• Oxygen enters the body

• Blood flows out of the heart

What is the function of the pharynx?

• Absorbs oxygen

• Pumps blood

• Transports air, food, and liquids

• Filters carbon dioxide

What is the role of alveoli?

• Pump blood

• Exchange gases

• Store nutrients

• Absorb water

Which part connects the pharynx to the bronchi?

• Trachea

• Diaphragm

• Capillaries

• Veins

What causes air to move out of the lungs during exhalation?

• Diaphragm contracts

• Diaphragm relaxes

• Oxygen enters the blood

• Alveoli expand

What is the main organ of the circulatory system?

• Lungs

• Kidneys

• Heart

• Liver

Which vessels carry blood away from the heart?

• Veins

• Arteries

• Capillaries

• Bronchi

What type of blood is carried by veins?

• Oxygen-rich

• Carbon dioxide-rich

• Nutrient-rich

• Waste-free

What is the role of capillaries?

• Pump blood

• Absorb oxygen

• Enable exchange of gases and nutrients

• Store carbon dioxide