Circulatory system

Name the large artery that brings oxygenated blood to the body

• Vena Cava

• Aorta

• Pulmonary artery

• Pulmonary vein

Answer explanation

The answer is the aorta, which is the largest and most important artery in the human circulatory system, responsible for delivering oxygenated blood throughout the body. Without the aorta, the heart would be unable to adequately distribute oxygenated blood, which is necessary for the proper operation of all body organs. This is why the aorta is the main artery in systemic circulation.

Name the type of circulation that goes from the heart to the body

• body circulation

• pulmonary circulation

• lung circulation

• systemic circulation

Answer explanation

The answer is systemic circulation, which refers to the portion of the circulatory system that transports oxygenated blood from the heart to the body and returns deoxygenated blood to the heart. In contrast, pulmonary circulation refers to the passage of blood from the heart to the lungs, where it is oxygenated. Thus, systemic circulation refers to the flow of blood between the heart and the rest of the body.

What is the name of the circulation that carries deoxygenated blood from the body back to the heart and then the lungs?

• systemic circulation

• pulmonary circulation

• coronary circulation

• venous circulation

Answer explanation

The pulmonary circulation transports deoxygenated blood from the heart to the lungs for oxygenation, hence it is the right response when discussing blood flow between the heart and lungs. Systemic circulation involves the return of deoxygenated blood from the body to the heart, whereas pulmonary circulation completes the cycle by reoxygenating the blood.

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

• Pulmonary vein

• Aorta

• Pulmonary artery

• Vena Cava

Answer explanation

The pulmonary veins are the only veins in the body that carry oxygenated blood, therefore they convey it from the lungs to the heart.

Blood traveling in the pulmonary circuit goes through the ​ (a)   side of the heart and out to the ​ (b)   . Blood traveling in the systemic circuit goes through the​ (c)   side of the heart and out to the ​ (d)   .

• right
• lungs
• left
• body
• vena cava
• pulmonary artery
• heart

The walls of the left ventricle are thicker than the walls of the right ventricle

• True

• False

Answer explanation

The left ventricle's larger walls allow it to produce the high pressure required to pump blood throughout the body, whereas the right ventricle only needs to pump blood a short distance to the lungs at lower pressure.

The valve that separates the left atrium and the left ventricle is the ​ ​ (a)   or ​ (b)  

• Tricuspid
• Bicuspid
• aortic 
• pumlonary
• mitral

Answer explanation

The mitral valve takes its name from the fact that it resembles a bishop's mitre (hat) and contains two leaflets or cusps, therefore it is also known as the bicuspid valve.

The valve that separates the right atrium and ventricle is the __ valve.

Answer explanation

The tricuspid valve is named from its three cusps (or leaflets), which set it apart from the bicuspid (mitral) valve on the left side of the heart.

explain the pathway that oxygenated blood travels through the heart

Answer explanation

The pulmonary veins carry oxygenated blood from the lungs back to the heart, where it enters the left atrium. When the left atrium contracts, it opens the mitral valve, allowing blood to enter the left ventricle. This pathway is critical for preparing oxygen-rich blood to be pumped into the aorta and circulated across the body.

explain the pathway that deoxygenated blood travels through the heart

Answer explanation

Deoxygenated blood returns to the heart, from the body, through the superior and inferior vena cava, entering the right atrium. When the right atrium contracts, it pushes blood through the tricuspid valve into the right ventricle where it then returns to the lungs. This pathway is essential as it sets the stage for the heart to pump the deoxygenated blood to the lungs for oxygenation.