双语字幕Right Atrium 右心房 The atria of the heart, which are known singularly as an atrium, are a pair of blood collecting chambers that comprise two of the four chambers of the heart.心脏的心房（单数形式：atrium，复数形式：atria）是一对血液收集腔室，它由心脏 4 个腔室中的 2 个组成。 The main function of the atria is to facilitate circulation by rhythmically contracting and relaxing their walls, pushing the blood that is returned to them via the major venous vessels during ventricular systole into the ventricles.心房的主要功能是通过有节律地收缩和松弛心房壁来促进血液循环，在心室收缩期，通过主要静脉血管推动返回心房的血液进入心室。 The right atrium is situated just above the right ventricle of the heart and is separated from it by the cuspid valves. The atria are built and held up by rigid endocardial muscle fibers that completely encompass the blood as it flows through them.右心房位于心脏右心室上方，二者之间由尖瓣隔开。心房由坚韧的心内膜肌纤维构成和支撑，当血液流经心房时，这些肌纤维完全包笼血液。 The right atrium receives deoxygentated venous flow from the superior and inferior vena cavae, the coronary sinus, as well as the anterior and the smallest cardiac veins.右心房接收来自上腔静脉和下腔静脉、冠状窦，以及心前静脉和心最小静脉的脱氧静脉血流。 It passes the blood through the tricuspid valve seen on this image highlighted in green, has three septae, and is also known as the right atrioventricular valve.它通过三尖瓣（如图中绿色区域所示）泵送血液，三尖瓣有 3 个隔瓣，又称右房室瓣。 The main anatomical features of the right atrium include the sinus venarum, which surrounds the opening of the superior and inferior vena cavae as well as the coronary sinus, which in turn, are also major structures.右心房的主要解剖学特征包括环绕上腔静脉和下腔静脉开口的静脉窦，以及冠状窦，而冠状窦也是主要的结构。 The walls of the right atrium are made of pectinate muscles which form a pouch known as the right auricle. The crista terminalis separates the cardiac and smooth muscle layers of the atrial walls while the interatrial septum divides the atria.右心房壁由梳状肌组成，梳状肌形成称为右心耳的囊袋。界嵴分离心房壁的心肌层和平滑肌层，而房间隔则分隔心房。 相关单词学习
Atrioventricular
①发音和释义 a•tri•o•ven•tric•u•lar/ˌeɪtrɪoʊven'trɪkjələ/adj. 房室的Of or pertaining to the atria and ventricles of the heart. 单词 atrioventricular 由下列成分构成 atrio-心房+ventricular 心室的（图源：太帅图库）
