Cardiovascular System Quiz pt 1

What is the primary function of the cardiovascular system?

• Digestion of food

• Circulation of blood

• Production of hormones

• Regulation of body temperature

Answer explanation

The primary function of the cardiovascular system is the circulation of blood, which transports oxygen, nutrients, and waste products throughout the body, supporting overall health and function.

What is the primary function of the respiratory system in the coupled unit?

• Adds CO₂ & Removes O₂

• Adds O₂ & Removes CO₂

• Circulation: delivery

• Digestion: absorption

Answer explanation

The primary function of the respiratory system is to add O₂ to the blood and remove CO₂, which is a waste product of metabolism. This gas exchange is essential for maintaining cellular respiration and overall homeostasis.

What is the main role of the circulatory system in the coupled unit?

• Adds O₂ & Removes CO₂

• Circulation: delivery

• Digestion: absorption

• Excretion: filtration

Answer explanation

The main role of the circulatory system is to facilitate circulation, which involves the delivery of oxygen and nutrients to cells and the removal of waste products. Thus, 'Circulation: delivery' is the correct choice.

What is another name for the "coupled unit" of the circulatory and respiratory systems?

• Digestive system

• Excretory system

• Cardiopulmonary system

• Nervous system

Answer explanation

The "coupled unit" of the circulatory and respiratory systems is known as the "cardiopulmonary system." This term reflects the interdependent functions of the heart (cardio) and lungs (pulmonary) in maintaining oxygen and blood flow.

Which side of the heart is responsible for pumping deoxygenated blood to the lungs?

• Left side

• Right side

• Both sides

• Neither side

Answer explanation

The right side of the heart is responsible for pumping deoxygenated blood to the lungs for oxygenation. This process is essential for maintaining the body's oxygen supply.

Through which vessels does the pulmonary circuit return oxygenated blood to the left atrium?

• Pulmonary arteries

• Pulmonary veins

• Vena cavae

• Aorta

Answer explanation

The pulmonary circuit returns oxygenated blood to the left atrium through the pulmonary veins. These vessels carry oxygen-rich blood from the lungs, while the pulmonary arteries carry deoxygenated blood to the lungs.

What is the main function of the systemic circuit?

• Pump deoxygenated blood to the lungs

• Return oxygenated blood to the heart

• Pump oxygenated blood to the whole body

• Return deoxygenated blood to the lungs

Answer explanation

The systemic circuit's main function is to pump oxygenated blood from the heart to the entire body, delivering essential nutrients and oxygen to tissues, while returning deoxygenated blood back to the heart.

Which vessel carries oxygenated blood from the left ventricle to the body?

• Pulmonary artery

• Vena cavae

• Aorta

• Pulmonary vein

Answer explanation

The aorta is the main vessel that carries oxygenated blood from the left ventricle of the heart to the rest of the body, making it the correct answer. The pulmonary artery carries deoxygenated blood, while the vena cavae return deoxygenated blood to the heart.

What is the job of the heart similar to?

• A computer

• An engine

• A refrigerator

• A light bulb

Answer explanation

The heart functions like an engine by pumping blood throughout the body, providing the necessary energy and circulation, similar to how an engine powers a vehicle.

What does the heart create to pump the blood?

• Pressure

• Light

• Sound

• Heat

Answer explanation

The heart creates pressure to pump blood throughout the body. This pressure is essential for circulating blood to deliver oxygen and nutrients to tissues.