The Mammalian Heart & Cardiac Cycle

Revision video for AQA AS Biology Unit 1 - Biology & Disease.

In this video, we look at the Heart; it's structure and the importance of valves. We also look at the cardiac cycle; along with the role of the nodes.

This is a difficult topic; and it's quite an intense video, so it might be worth viewing this in stages.

Видео The Mammalian Heart & Cardiac Cycle канала Mr Pollock