Chapter 34, Problem 6A

Summary Introduction

Introduction:

The heart is a muscular organ approximately the size of a fist, present just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system. The heart has four chambers, they are- right atrium, right ventricle, left atrium, left ventricle. The left ventricle’s strong contractions create our blood pressure.

Answer to Problem 6A

Correct answer :

The correct answer is option B referred to left atrium.

Explanation of Solution

Explanation/justification for the correct answer :

Option B referred to left atrium. Oxygen-high blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. So, the correct answer is option C.

Explanation for incorrect answer :

Option A referred to the right atrium. The right atrium is the primary chamber of the heart to get deoxygenated and carbon dioxide-rich systemic blood from the body. So, this is an incorrect answer.

Option C referred to the right ventricle. The right ventricle is the chamber within the heart that manages the pumping of oxygen-depleted blood to the lungs. So, this is an incorrect answer.

Option D referred to the left ventricle. The purpose of the left ventricle is to pump oxygenated blood from the lungs out to the body. Decreased feature of the left ventricle, therefore, impairs tissue oxygenation.  So, this is an incorrect answer.