B1 Heart and Lungs

What is the function of the pulmonary artery?

• Carries oxygenated blood from the lungs to the heart.

• Carries deoxygenated blood away from the heart to the lungs.

• Carries deoxygenated blood from the rest of the body to the heart.

• Carries oxygenated blood from the heart to the rest of the body.

Describe the role of the heart valves.

• Controls the heart rate, keeping it regular

• pushes blood around the whole body

• Prevent backflow of blood.

• only lets oxygen through

Answer explanation

Controls the heart rate, keeping it regular - pace maker

What is the function of the aorta.?

• Carries oxygenated blood from the lungs to the heart.

• Carries deoxygenated blood away from the heart to the lungs.

• Carries deoxygenated blood from the rest of the body to the heart.

• Carries oxygenated blood from the heart to the rest of the body.

What structure in the lungs increase the rate of diffusion by having a large surface area, being moist and have a good blood supply?

• villi

• alveoli

• aorta

• veins

What chamber of the heart is shown in the diagram?

• left ventricle

• right ventricle

• left atrium

• right atrium