The human heart is an organ that one could consider the engine of the entire human body. This organ spearheads the entire circulatory system, which sends blood, oxygen and nutrients throughout the body. It's found in the left most portion of the rib cage, just beneath the chest cavity. The heart is the hardest working muscle in the body, as it beats non-stop, thanks to electrical impulses that radiate. Anyone looking to study human cardiac anatomy should get an idea of the each cardiac physiology component and how they work together to accomplish this process.
In terms of cardiac anatomy, it all begins with four important pieces. The heart anatomy consists of two sets of valve chambers, known as atria and ventricles. The two valves at the top of the heart are known as atria, and are found on the left and right. The two bottom valves are the ventricles. The atria return blood to the heart from other areas of the body, while the ventricles pump the blood throughout the human body.
Human cardiac anatomy also consists of the heart wall, which features epicardium, the heart's outer layer, myocardium, the very muscular middle portion of the heart and the endocardium, the innermost layer. Blood is carried away from the heart and throughout the body via a set of arteries. Blood is distributed throughout the body via veins. Bundles of fiber and nodes create the electrical impulses that allow the human heart to beat. If a person were to close their fist, slightly open it and close it, in rhythmic motion, this would be a simplistically accurate display of the human heart. The human heart is very close in size to the human fist, but weighs roughly 8 ounces.
Human cardiac anatomy operates the cardiac cycle, which is the process by which the heart beats and distributes blood. This process is split into two phases, the diastole and systole phases. During diastole, ventricles are at rest, while the atria open to allow blood to flow inside. Conversely, during systole, the ventricles contract and send blood throughout the arteries. When studying
In order to study cardiac anatomy, a person should become familiar with these core parts. Cardiac physiology is a complex process that allows people to live and thrive, retaining the proper amount of blood, oxygen and nutrients to conduct a number of process. Many people put their hands over their hearts during the Pledge of Allegiance, engage in aerobic exercise and understand that the heart is important, but don't know exactly what processes this entails. Gaining an understanding of heart anatomy will allow people to understand what happens when their body is at work.
Atlas of Human Cardiac Anatomy – This University of Minnesota sponsored site features an entire interactive atlas of the heart. It provides a detailed description of the uses of the atriums, ventricles, aorta and other parts of the human heart.
The Virtual Heart – Cardiac Arrhythmia Modeling – The site offers a virtual walk through of the entire heart, showing people how the many parts of the heart coordinate to get the job done.
The Heart (Human Anatomy): Diagram, Definition, Location in the Body and Heart Problems – This article features a labeled diagram of the heart, along with a breakdown of what role each part plays.
The Human Heart – Parts of the Heart – Heart rates – Heart Diseases – English-Online provides an article with definitions of the heart's components, along with the role of the heart in the body.
Structure of the Human Heart: An Online Exploration From the Franklin Institute, made possible by Unisys – The Franklin Institute explains the structure of the heart and how valves and vessels work to provide for the circulatory system.
Heart, Heart Information, Cardiovascular Facts, News, Photos – National Geographic – National Geographic offers definitions and an interactive diagram related to the human heart.
Main Frame Heart Development – Christa Wellman and John A. McNulty give a report about the development of the human heart while in the womb.
A Look into The Heart – Function of the Heart – This piece provides a wealth of information about the human heart, including colored diagrams with labels and definitions.
Anatomy of the Human Heart – Texas Heart Institute Heart Information Center – The institute offers facts about the heart with illustrations.
The Human Heart – This site gives definitions and detailed information on every major part of the human heart.
Fun Heart Facts for Kids – Interesting Facts about the Human Heart – Science Kids offers straight forward and informative facts about the human heart.
The Human Heart – This site gives interesting information about the human heart, along with a thorough diagram with facts related to beats per minute, beats per day, milliliters of blood pumped and more.
CV Physiology: The Cardiac Cycle – This article details the two phases of the cardiac cycle, along with a number of other pieces of useful information.
Circulatory Systems III – This graphic intensive report features diagrams, bullet point facts and in depth information related to the heart and the entire circulatory system.
See also our page on heart abnormalities for more information on how the heart works.
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Written by David Patterson and last updated 2015-01-20