Heart = Pump
The Heart is simply a pump, how this pump works is regulated by an electrical conduction system, that is explained here Simplified – The Heart Beat – Conduction System
The purpose of of this pump is to supply blood to the lungs (so that the blood can become oxygen rich) and then round to the rest of the body where that oxygen rich blood is then required. The pump also ensures that the blood returns back to do this all over again.
|The Heart and its Four Chambers
The pump has four chambers; The Right Atrium (R.A), Right Ventricle (R.V.), Left Atrium (L.A.), Left Ventricle (L.V.). These are shown in the image 1.
The right atrium receives its blood from the body, this is deoxygenated blood (blood that has been used by muscles and organs already). The right Atrium feeds the right ventricle which then pumps the blood through the lungs (Pulmonary System). Where it becomes Oxygen rich and ready for use by the body. This oxygen rich blood is received by the left Atrium which feeds the Left Ventricle. The left Ventricle pumps blood to the rest of the body (The Circulatory System).
This flow of events is shown in image 2.
|Image 2. The flow of blood through the Pulmonary and Circulatory Systems
This is just a very basic overview for anyone just starting to learn about the heart. I am not sure it tells people much that they didn’t already know, but I felt it had a place in my blog!
Thanks – Time for a Shower
The Cardiac Technician