What are the external structures of the heart?
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What are the external structures of the heart?
The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.
What are the internal features of the heart?
The heart contains four inner chambers: two atria (upper chambers) and two ventricles (lower ventricles). The pulmonary trunk is a vessel that brings deoxygenated blood from the left ventricle into the lungs. Pulmonary veins return the oxygenated blood from the lungs back into the heart.
What are the 3 characteristic of heart?
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. The heart pumps blood with a rhythm determined by a group of pacemaker cells in the sinoatrial node.
What are some characteristics unique to the left ventricle versus the right?
Results. The left ventricle has many unique features including walls that are thicker than those of the right ventricle, an overlap of its inlet and outlet portions, and the hinge of the leaflets of the mitral valve that are oriented cranially relative to those of the tricuspid valve.
Which heart chamber forms most of the heart inferior surface?
It is formed mainly by the right ventricle. The apex (the most inferior, anterior, and lateral part as the heart lies in situ) is located on the midclavicular line, in the fifth intercostal space. It is formed by the left ventricle.
What are the differences between right ventricle and left ventricle?
Right Ventricle vs Left Ventricle
| Right Ventricle | Left Ventricle |
|---|---|
| Develops a lower pressure than the left ventricle while pumping blood | Develops higher pressure while pumping blood |
| Triangular in shape and is near the apex of the heart | Oval in shape and forms the apex of the heart |
What is the difference between the right and left ventricle?
The left ventricle is the thickest of the heart’s chambers and is responsible for pumping oxygenated blood to tissues all over the body. By contrast, the right ventricle solely pumps blood to the lungs.
What is heart structure?
The heart is divided into four chambers consisting of two atria and two ventricles; the atria receive blood, while the ventricles pump blood. The right atrium receives blood from the superior and inferior vena cavas and the coronary sinus; blood then moves to the right ventricle where it is pumped to the lungs.