The upper chambers of the heart are called the:

Question

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Restating the question and options: The question asks: The upper chambers of the heart are called the: 
- Options: 1) atria  2) pericardia  3) bicuspids  4) ventricles

Analysis of each option:
Option 1: 'atria' — This is the correct anatomical term for the two upper chambers of the heart (the left atrium and the right atrium). They receive blood returning to the heart and pass it to the lower chambers. Understanding the role of the atria in the cardiac cycle confirms why this is the right answer.
Option 2: 'pericardia' — The term 'pericardium' refers to the double-walled sac that encloses the heart, not a chamber of the heart itself. The plural 'pericardia' would refer to multiple pericardia, which isn’t a relevant structure in describing heart chambers.
Option 3: 'bicuspids' — Also known as the premolar teeth in dental anatomy, or in some contexts as a term for a type of heart valve in older literature, but not used to name the heart’s chambers. This option confuses dental anatomy or an obsolete term with cardiac anatomy, making it incorrect.
Option 4: 'ventricles' — The ventricles are the lower chambers of the heart, responsible for pumping blood to the lungs and to the rest of the body. Since the question specifies 'upper chambers,' this option contradicts the anatomical arrangement and is therefore incorrect.

In summary, option 1 correctly identifies the upper chambers as atria, while options 2, 3, and 4 misname or misplace the cardiac structures, either by naming the surrounding membrane, mixing dental terminology, or naming the lower chambers.

hk_264_120258_248438 Chapter 8 Self Test: Circulatory (Cardio/vascular) System

The upper chambers of the heart are called the:

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