心分成了四个腔室有两个劣质间歇泵排出血液从心脏称为右和左心室和两个上级底漆泵称为左右心房接受缺氧和含氧血液从身体和肺部。心室彼此分离的相对厚的肌肉叫做室间隔但心房彼此分离的相对薄墙称为房间隔轻负载比较心室。右心室厚墙比较左心室,因为它已经在体循环泵出更多的血。心脏瓣膜的存在可以防止血液回流的血液,因此确保有效地向一个方向流动。有两种类型的阀门的房室(AV)阀门和半月形的阀门。AV阀门包括的三尖瓣和僧帽(二尖瓣)阀门位于左侧和右侧心脏的心室和心房之间的分别。另一方面,半月形的阀门躺在主动脉和肺动脉的基地。这些阀门由肺动脉瓣和主动脉瓣。三尖瓣有螺纹结构连接到肌腱像绳索叫做腱tendinae。心脏和心脏瓣膜的解剖结构如图3所示。
加拿大奥哥那根大学学院论文代写：心脏的泵作用
The heart is divided into four chambers which has two inferior intermittent pumps which discharge blood out of the heart called the right and the left ventricles and two superior primer pumps called the right and left atria receiving deoxygenated and oxygenated blood from the body and the lungs respectively. The ventricles are separated from each other by a relatively thick muscle called the interventricular septum but atria are separated from each other by relatively a thinner wall called the interatrial septum as it has lighter workload comparing the ventricles. The right ventricle has thicker walls comparing the left ventricle because it has to pump more blood during systemic circulation. The presence of heart valves prevents the back flow blood and hence ensures that blood flows effectively in one direction. There are two types of valves which are the atrioventricular (AV) valves and the semilunar valves. The AV valves consists of the the tricuspid and bicuspid (mitral) valves that are located on the right and left side of the heart between the ventricles and atria respectively. The semilunar valves on the other hand lie on the bases of aorta and the pulmonary artery. These valves consists of the pulmonary valve and the aortic valve. The tricuspid valve has thread like structures that are connected to tendon like cords called the chordae tendinae. The anatomical structure of the heart and the heart valves is shown in figure 3.