Search results
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.
The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium. [8] In all vertebrates, the heart has an asymmetric orientation, almost always on the left side.
The heart has four chambers: the left and right atriums and the left and right ventricles. They form a shallow groove at the line of their junction, which form the atrioventricular groove. The atrioventricular groove hosts major coronary arteries while they travel along to the line of attachment of atrioventricular valves.
Oct 31, 2024 · In humans it is situated between the two lungs and slightly to the left of centre, behind the breastbone; it rests on the diaphragm, the muscular partition between the chest and the abdominal cavity. The heart consists of several layers of a tough muscular wall, the myocardium.
- 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...
Biology Article. Human Heart. The heart is a muscular organ that is situated in the front of the chest. It pumps blood all through the body in a process called circulation. Apart from the heart, the blood vessels and blood as a unit constitute the cardiovascular system. 4,765. Table of Contents. Introduction. Position. Functions of the Human Heart.
- 77 min
- Pulmonary circulation is a type of blood circulation responsible for carrying deoxygenated blood away from the heart, and to the lungs, where it is...
- In systemic circulation, the heart pumps the oxygenated blood through the arteries to every organ and tissue in the body, and then back again to th...
- The heart is a muscle, and it needs a constant supply of oxygenated blood to survive and work effectively. This is where coronary circulation fulfi...
- The human heart is divided into four chambers, namely two ventricles and two atria. The ventricles are the chambers that pump blood and atrium are...
- Left atrium Right atrium Left ventricle Right ventricle
- The pericardium is a fibrous membrane that envelops the heart. It also serves a protective function by producing a serous fluid, which lubricates t...
- The heart wall is made up of 3 layers, namely: Epicardium – This is the outermost layer of the heart. It is composed of a thin layer of membrane th...
- The blood vessels comprise: Veins – It supplies deoxygenated blood to the heart via inferior and superior vena cava, eventually draining into the...
- Valves are flaps of tissues that are present in cardiac chambers between the veins. They prevent the backflow of blood. Examples include the atriov...
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.
That's why we say that it has four sides: anterior (sternocostal), inferior (diaphragmatic), left pulmonary and right pulmonary. Its shape is comparable to a tilted cone. Human ...
