The chamber of the heart which receives oxygenated blood from the lungs is the?

Appeared in: IGNOU PB Bsc Nsg Entrance-2017

Explanation

The left atrium is the superior-posterior chamber of the heart that forms most of the heart's base.
Its primary function is to act as a receiving chamber for oxygenated blood returning from the lungs.
Four pulmonary veins (two from each lung) drain directly into the left atrium.
From the left atrium, blood flows into the left ventricle, which then pumps it to the rest of the body.

Option B: The right atrium receives deoxygenated blood from the body through the superior and inferior vena cava, not oxygenated blood from the lungs.
Option C: The left ventricle contains oxygenated blood, but it receives it from the left atrium, not directly from the lungs. Its function is to pump blood to the body.
Option D: The right ventricle contains deoxygenated blood, which it receives from the right atrium and pumps to the lungs for oxygenation.

Clinical Relevance

Nursing practice connection: Knowing Anatomy and physiology of cardiac circulation helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding the path of blood flow is fundamental for nurses to interpret patient signs and symptoms, such as cyanosis (indicating poor oxygenation) or pulmonary edema (which can result from left-sided heart failure).
Conditions like atrial fibrillation often originate in the left atrium. This arrhythmia can lead to blood clots, increasing the risk of stroke, which highlights the clinical importance of this chamber.
What if... the mitral valve between the left atrium and left ventricle was stenotic (narrowed)? This would impede blood flow, causing blood to back up into the left atrium and subsequently the lungs, leading to pulmonary congestion and shortness of breath.

How to Approach the Question

First, identify the key terms in the question: 'chamber of the heart', 'receives', 'oxygenated blood', and 'from the lungs'.
This is a direct recall question about anatomy and physiology.
Mentally trace the path of blood after it leaves the lungs. Recall that blood becomes oxygenated in the lungs.
Remember that veins carry blood to the heart. The pulmonary veins are the vessels that return blood from the lungs.
Recall which chamber the pulmonary veins empty into. This is the left atrium.
Evaluate the options based on this knowledge to select the correct chamber.

Concept Tested & Keywords

QOCDynZzrB_F8dxq4teUwU

E6 Anatomy Applied Ashalatha 4e pp. 161-163, 162-164

Practise the full IGNOU PB Bsc Nsg Entrance-2017

Attempt every question from this paper in a timed mock, then review the full solution for each one.