Right Ventricle – Function, Definition and Anatomy – Human Anatomy | Kenhub

Right Ventricle – Function, Definition and Anatomy – Human Anatomy | Kenhub


Hey, everyone! It’s Matt from Kenhub, and
in this tutorial, we will discuss the right ventricle. The cardiac ventricles are the
two lower chambers of the heart quadrants. They are larger and more apically narrowed
than the atria. Collecting the blood that flows into them from the atria, they then
contract and force the accumulated blood volume out into the peripheral tissues via the major
vessels. The right ventricle collects deoxygenated
blood from the right atrium as the tricuspid valve relaxes and pumps it via rhythmic contractions
through the pulmonary valve and its roof and into the pulmonary trunk which passes the
blood into the pulmonary artery and into the lungs. It is bordered anterosuperiorly by
the sternum, and this circular convexed area majorly contributes to the sternocostal surface
of the heart. The inferior surface is situated upon the diaphragm and this small flat area
makes up part of the diaphragmatic portion of the heart. The ventricular septum borders
the right ventricle posteriorly and bulges somewhat into it creating a transverse semi-lunar
cross-section. The conus arteriosus, conical arterial pouch
or infundibulum of the heart, can be found in the upper left corner of the ventricle
and gives rise to the pulmonary artery. The tendon of the conus arteriosus is a fibrous
band that extends superiorly from the right atrioventricular fibrous ring and stretches
between the posterior surface of the conus arteriosus and the aorta. The right ventricular wall is 3-6 times thinner
than the left because it starts off thicker and reduces en masse towards the apex. Despite
this difference in muscle mass, the inner chambers of the ventricles are the same size
and can contain approximately 85 mL of blood in adults. This video is more fun than reading a textbook,
right? If you want more videos, interactive quizzes, articles, and an atlas of human anatomy,
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