Section 2
Circulation and Heart Valves
Book
Version 29
By Boundless
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
4 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/5270/raw/coronary-arteries.jpg)
Heart Circulation
Coronary circulation is the circulation of blood in the blood vessels of the heart.
![Thumbnail](../../../../../../figures.boundless-cdn.com/5271/square/heart-valves.jpeg)
Operation of Atrioventricular Valves
The atrioventricular valves separate the atria from the ventricles and prevent backflow from the ventricles into the atria during systole.
![Thumbnail](../../../../../../figures.boundless-cdn.com/6627/square/gray494.jpg)
Operation of Semilunar Valves
The semilunar valves allow blood to be pumped into the major arteries, but prevent backflow of blood from the arteries into the ventricles.
![Thumbnail](../../../../../../figures.boundless-cdn.com/3810/raw/alveolus-diagram.jpg)
Systemic and Pulmonary Circulation
The cardiovascular system has two distinct circulatory paths, pulmonary circulation and systemic circulation.