6 医学英语The Chambers of the Heart

The heart is divided into left and right sides. Each side is subdivided to form the four chambers of the heart.

 The atria are the two upper chambers of the heart. They are the receiving chambers, and all blood vessels coming into the heart enter here (singular, atrium).

The atria are separated by the interatrial septum. A septum is a wall that separates two chambers.

 The ventricles are the two lower chambers of the heart. They are the pumping chambers,and all blood vessels leaving the heart emerge from the ventricles. A ventricle is defined as a normal hollow chamber of the heart or the brain.

 The ventricles of the heart, which are separated by the interventricular septum, are the pumping chambers. 

词汇：atria 心房（复数）            atrium心房（单数）

            interatrial septum 房间隔

            ventricles 心室（复数）  ventricle 心室（单数）

            interventricular septum 室间隔

前缀：inter- 在...之间

词根：ventricul （心）室

后缀：-ar 与...有关的

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