会员中心 |  会员注册  |  兼职信息发布    浏览手机版!    超值满减    人工翻译    英语IT服务 贫困儿童资助 | 留言板 | 设为首页 | 加入收藏  繁體中文
当前位置:首页 > 外语学习 > 英语学习 > 英语阅读学习 > 正文

医学文章阅读——The Heart

发布时间: 2024-11-22 09:29:41   作者:etogether.net   来源: 网络   浏览次数:
摘要: The chambers of the heart are divided by walls, each of which is called a septum.


The heart is located between the lungs, with its point or apex directed toward the left. The thick muscle layer of the heart wall is the myocardium. This is lined on the inside with a thin endocardium and is covered on the outside with a thin epicardium. The heart is contained within a fibrous sac, the pericardium. 

Each of the upper receiving chambers of the heart is an atrium (plural, atria). Each of the lower pumping chambers is a ventricle (plural, ventricles). The chambers of the heart are divided by walls, each of which is called a septum. The interventricular septum separates the two ventricles; the interatrial septum divides the two atria. There is also a septum between the atrium and ventricle on each side.

The heart pumps blood through two circuits. The right side pumps blood to the lungs to be oxygenated through the pulmonary circuit. The left side pumps to the remainder of the body through the systemic circuit.


责任编辑:admin

微信公众号

我来说两句
评论列表
已有 0 条评论(查看更多评论)