This week we're going to talk about cardiovascular physiology and

本周我们要讲心血管生理学和
the cardiovascular system,

心血管系统
which includes the blood, the blood vessels, and the heart.

包括血液血管和心脏
We're going to focus on several features.

我们要关注这个系统的一些特征
This is obviously a big topic,

显然这是个大课题
not only understanding

我们不仅要了解
the basic physiology of the cardiovascular system,

心血管系统的基本生理学知识