HEARTCHAMBER
Heart chamber
Heart chamber is a general term used to refer to any chambers of the mammalian heart. The heart consists of four chambers: the right and left atrium and the right and left ventricle. The top chambers are connected to the bottom chambers by valves and are separated by the coronary sulcus. The left and right side of the heart are separated by the posterior interventricular sulcus.The above text is a snippet from Wikipedia: Heart chamber
and as such is available under the Creative Commons Attribution/Share-Alike License.