Human Body Systems Quiz

What is the primary function of the circulatory system?

• Sending nerve signals

• Digesting food

• Producing hormones

• Transporting oxygen and nutrients to cells

Which organ is responsible for pumping blood through the circulatory system?

• Kidney

• Heart

• Liver

• Lungs

What type of blood vessels carry oxygen-rich blood?

• Capillaries

• Bronchi

• Veins

• Arteries

Which part of the blood is primarily responsible for transporting oxygen?

• White blood cells

• Red blood cells

• Plasma

• Platelets

What is the main function of the respiratory system?

• To digest food

• To circulate blood

• To filter toxins

• To exchange gases

Which structure in the heart ensures the direction of blood flow?

• Atrium

• Ventricle

• Valve

• Capillary

What is the largest artery in the human body?

• Carotid artery

• Jugular vein

• Pulmonary artery

• Aorta

What do capillaries do?

• Carry waste products to the liver

• Filter blood

• Deliver oxygen and nutrients to cells

• Pump blood back to the heart

Which part of the respiratory system is directly involved in gas exchange?

• Larynx

• Bronchi

• Trachea

• Alveoli

What is the role of the diaphragm in respiration?

• It filters the air

• It warms the air

• It contracts to help inhale

• It absorbs nutrients