Understanding the Human Heart and Circulatory Systems

What is the primary function of the heart?

• To pump blood throughout the body

• To produce blood cells

• To filter blood

• To store oxygen

How does the blood travel in a single circulatory system?

• Heart -> Lungs -> Body

• Heart -> Body -> Lungs -> Heart

• Heart -> Gills -> Body -> Heart

• Heart -> Lungs -> Heart -> Body

What advantage does a double circulatory system have over a single circulatory system?

• It has fewer blood vessels

• It delivers oxygen more slowly to organs

• It pumps blood faster due to less pressure loss

• It requires less energy

Which chamber of the heart has the thickest wall?

• Left atrium

• Right atrium

• Right ventricle

• Left ventricle

What is the role of valves in the heart?

• To prevent backward flow of blood

• To filter blood

• To pump blood

• To oxygenate blood

Which blood vessel carries oxygenated blood from the lungs to the heart?

• Pulmonary vein

• Pulmonary artery

• Aorta

• Vena cava

How does the left ventricle differ from the right ventricle?

• It pumps blood to the lungs

• It has a thinner wall

• It pumps blood to the entire body

• It receives oxygenated blood from the lungs

What is the function of the coronary arteries?

• To supply oxygen to the heart muscle

• To carry blood away from the heart

• To collect carbon dioxide from the heart muscle

• To regulate heart rate

What triggers the contraction of the heart?

• The atria

• The ventricles

• The aorta

• The pacemaker

What is the purpose of an artificial pacemaker?

• To filter blood

• To increase blood pressure

• To correct irregular heartbeats

• To oxygenate blood