Human Heart Function Quiz

What is the role of the left ventricle in the heart?

• To receive oxygen-rich blood from the lungs

• To pump oxygen-rich blood to the body

• To receive oxygen-poor blood from the body

• To pump oxygen-poor blood to the lungs

Answer explanation

The left ventricle's primary role is to pump oxygen-rich blood to the body, ensuring that all tissues receive the necessary oxygen and nutrients for proper function.

Which blood vessel carries oxygen-rich blood from the lungs to the heart?

• Pulmonary artery

• Pulmonary vein

• Aorta

• Vena cava

Answer explanation

The pulmonary vein carries oxygen-rich blood from the lungs to the heart, while the pulmonary artery carries oxygen-poor blood from the heart to the lungs. The aorta and vena cava serve different functions in the circulatory system.

Which chamber of the heart pumps blood to the lungs?

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

Answer explanation

The right ventricle is responsible for pumping deoxygenated blood to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs, while the left ventricle pumps it to the body.

What is another name for the circulatory system?

• Respiratory system

• Digestive system

• Circulatory system

• Nervous system

Answer explanation

The correct answer is 'Circulatory system' as it is the same term used to describe the system responsible for transporting blood and nutrients throughout the body. The other options refer to different systems.

What does the circulatory system remove from the body?

• Oxygen

• Carbon dioxide and metabolic waste

• Nutrients

• Hormones

Answer explanation

The circulatory system is responsible for removing carbon dioxide and metabolic waste from the body. Oxygen is delivered to cells, while carbon dioxide, a byproduct of metabolism, is transported back to the lungs for exhalation.

What role does the circulatory system play in immune system functioning?

• It produces antibodies

• It assists with immune system functioning

• It digests pathogens

• It filters blood

Answer explanation

The circulatory system assists with immune system functioning by transporting immune cells and antibodies throughout the body, enabling a rapid response to pathogens.

At what stage of embryonic development is the heart fully formed?

• 2nd week

• 4th week

• 6th week

• 8th week

Answer explanation

The heart begins to form during the 3rd week of embryonic development, but it is not fully formed until the 4th week. By this time, the heart has developed its basic structure and is functioning to circulate blood.

What is the average weight of the heart in women?

• 5-7 ounces

• 8-10 ounces

• 10-12 ounces

• 12-14 ounces

Answer explanation

The average weight of a woman's heart typically ranges from 8 to 10 ounces, making this the correct choice. This weight can vary based on individual factors, but 8-10 ounces is the standard average.

Where is the heart located in the body?

• Inside the abdominal cavity

• Inside the thoracic cavity

• Inside the cranial cavity

• Inside the pelvic cavity

Answer explanation

The heart is located inside the thoracic cavity, which is the area of the body that houses the lungs and heart, protected by the rib cage. The other options do not contain the heart.

How many times does the average heart beat per minute?

• 40-60 beats

• 60-80 beats

• 80-100 beats

• 100-120 beats

Answer explanation

The average heart beats 60-80 times per minute at rest, which is considered a normal range for adults. This makes '60-80 beats' the correct choice among the options provided.