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- The heart consists of several layers of a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and another layer, the endocardium, lines the inside. The heart cavity is divided down the middle into a right and a left heart, which in turn are subdivided into two chambers.
The two atria hold the blood that circulates away from the heart. The heart has four chambers and is divided into a right and left side by a muscular wall called the septum. The heart is located inside the ribcage and just to the right of the breast bonde. The average heart beats about 100,000 times a day.
- Heart Anatomy Flashcards
Which chambers are composed of more cardiac muscle? Study...
- Heart Anatomy Flashcards
Which chambers are composed of more cardiac muscle? Study with Quizlet and memorize flashcards containing terms like Aorta, Superior Vena Cava, Right Atrium and more.
Study with Quizlet and memorize flashcards containing terms like The inner layer of tissue that surrounds the heart, The muscle that attaches to the chordea tendineae and pulls the two A-V valves closed, The fluid filled space between the parietal pericardium and the visceral pericardium and more.
- Heart anatomy. The heart has five surfaces: base (posterior), diaphragmatic (inferior), sternocostal (anterior), and left and right pulmonary surfaces. It also has several margins: right, left, superior, and inferior
- Heart valves. Heart valves separate atria from ventricles, and ventricles from great vessels. The valves incorporate two or three leaflets (cusps) around the atrioventricular orifices and the roots of great vessels.
- Blood flow through the heart. The blood flow through the heart is quite logical. It happens with the heart cycle, which consists of the periodical contraction and relaxation of the atrial and ventricular myocardium (heart muscle tissue).
- Coronary circulation. The heart must also be supplied with oxygenated blood. This is done by the two coronary arteries: left and right. Heart muscles work constantly (thank goodness!)
Oct 31, 2024 · The heart consists of several layers of a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and another layer, the endocardium, lines the inside. The heart cavity is divided down the middle into a right and a left heart, which in turn are subdivided into two chambers.
- 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 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...
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.
Sep 30, 2020 · The heart’s walls consist of three layers of tissue: Myocardium: This is the muscular tissue of the heart. Endocardium: This tissue lines the inside of the heart and protects the valves and...
