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- The figure is labeled to showcase the heart’s basic anatomical structures, including; right and left atria and ventricles, and the aorta. The figure also highlights the specialized electrical conducting components such as; the sinoatrial (SA) node, atrioventricular (AV) node, bundle of His, and the Purkinje fibers.
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Jun 11, 2024 · The heart is a vital, fist-sized muscular organ located slightly on the left side of the chest. It consists of four main chambers: two atria and two ventricles. Understanding its basic anatomy is crucial to understanding how it functions.
- Location and Size of The Heart
- Normal Heart Anatomy and Physiology
- How The Heart Valves Work
The heart is located under the rib cage -- 2/3 of it is to the left of your breastbone (sternum) -- and between your lungs and above the diaphragm.The heart is about the size of a closed fist, weighs about 10.5 ounces, and is somewhat cone-shaped. It is covered by a sack termed the pericardium or pericardialsack.The normal heart anatomy consists of a four-chambered, hollow organ.It is divided into the left and right sides by a muscular wall called the septum.Normal heart anatomy and physiology need the atria and ventricles to work sequentially, contracting and relaxing to pump blood out of the heart and then to let the chambers refill. When blood leaves each chamber of the heart, it passes through a valve that is designed to prevent the backflow of blood. There are four heart valves within the heart: 1...
The heart valves work the same way as one-way valves in the plumbing of your home. They prevent blood from flowing in the wrong direction.Each valve has a set of flaps, called leaflets or cusps.The mitral valve has two leaflets; the others have three.The leaflets are attached to and supported by a ring of tough, fibrous tissue called the annulus.Jan 26, 2024 · Your heart has four separate chambers. You have two chambers on the top (atrium, plural atria) and two on the bottom (ventricles), one on each side of your heart. Right atrium: Two large veins deliver oxygen-poor blood to your right atrium. The superior vena cava carries blood from your upper body.
2 days ago · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double pump that is the center of the circulatory system in humans, other mammals, and birds. Learn more about the heart in this article.
- The Editors of Encyclopaedia Britannica
- In humans, the heart is situated between the two lungs and slightly to the left of center, behind the breastbone. It rests on the diaphragm, the mu...
- The heart consists of several layers of a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and ano...
- The pumping of the heart, or the heartbeat, is caused by alternating contractions and relaxations of the myocardium. These contractions are stimula...
- The rhythmic noises accompanying the heartbeat are called heart sounds. The two distinct sounds are heard, a low, slightly prolonged “lub” (first s...
Mar 10, 2015 · The heart is divided into four chambers: two atria and two ventricles. Blood is transported through the body via a complex network of veins and arteries.
Nov 3, 2023 · Do you find the anatomy of the heart confusing? Learn actively all the features of this organ and cement them long term by testing yourself using Kenhub's diagrams, quizzes and worksheets of the heart !
Feb 24, 2021 · Function and anatomy of the heart made easy using labeled diagrams of cardiac structures and blood flow through the atria, ventricles, valves, aorta, pulmonary arteries veins, superior inferior vena cava, and chambers.
