Deoxygenated blood from the body via superior and inferior vena cava is received in-

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2024

Explanation

The right atrium is the upper right chamber of the heart.
Its primary function is to act as a receiving chamber for all deoxygenated venous blood returning from the systemic circulation.
The superior vena cava (SVC) drains blood from the upper body (head, neck, arms).
The inferior vena cava (IVC) drains blood from the lower body (trunk, legs).
Both the SVC and IVC empty directly into the right atrium.

Option A: The left atrium receives oxygenated blood, not deoxygenated blood.
Option C: The left ventricle receives oxygenated blood from the left atrium and pumps it to the body. It does not receive blood from the vena cavae.
Option D: The right ventricle receives deoxygenated blood from the right atrium, not directly from the vena cavae.

Clinical Relevance

Nursing practice connection: Knowing Anatomy and Physiology of Cardiac Blood Flow helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding cardiac blood flow is fundamental to recognizing signs of heart failure, congenital defects, and valvular diseases.
The right atrium is the site for measuring Central Venous Pressure (CVP), a key indicator of fluid status and right ventricular function.
What if? If a patient has an Atrial Septal Defect (ASD), a hole between the atria, oxygenated blood from the higher-pressure left atrium can shunt to the right atrium. This mixes with deoxygenated blood, increasing blood volume to the lungs and potentially causing right-sided heart enlargement and pulmonary hypertension over time.

How to Approach the Question

First, identify the key terms in the question: 'Deoxygenated blood', 'superior and inferior vena cava', and 'received in'.
This is a factual recall question about the anatomy of the heart and the circulatory pathway.
Visualize or recall the path of blood through the heart. Blood from the body enters the right side of the heart first.
The vena cavae are the largest veins that bring blood to the heart from the body. The first chamber they empty into is the right atrium.
Evaluate the options: The left atrium and left ventricle handle oxygenated blood. The right ventricle receives blood from the right atrium. Therefore, the right atrium is the only correct option.

Concept Tested & Keywords

Concept Tested: Anatomy and Physiology of Cardiac Blood Flow
Stem keywords: Deoxygenated blood, superior vena cava, inferior vena cava, heart chamber
Lead-in keywords: BEST, MOST RELEVANT CLUE
Negative lead-in flag: false

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

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