Search results
Oct 31, 2024 · 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.
- Kids
Heart disease can lead to a heart attack. A heart attack...
- Coronary Heart Disease
Coronary heart disease, disease characterized by an...
- Heart Rate
heart rate, the number of times the ventricles of the heart...
- Pulmonary Circulation
pulmonary circulation, system of blood vessels that forms a...
- Heart Murmur
heart murmur, condition characterized by prolonged noises...
- Students
Encyclopædia Britannica, Inc. A muscular, pear-shaped organ...
- Ventricle
ventricle, muscular chamber that pumps blood out of the...
- Chambered Heart
Other articles where chambered heart is discussed:...
- Kids
- 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!)
Nov 10, 2024 · The heart is a four-chambered muscular organ with a complex structure that allows it to efficiently pump blood throughout the body. It is divided into two halves—the right and left sides—each responsible for different aspects of circulation. The heart consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle.
Sep 7, 2017 · The pericardium protects the heart from mechanical injury and checks its overstretching and overfilling with blood. External structure: The smaller upper chambers, auricles (atria) are demarcated externally from the lower larger chambers ventricles by an irregular groove called the coronary sulcus.
The base of the heart is quadrilateral and oriented posteriorly. It consists of the left atrium, a small portion of the right atrium, and the proximal parts of the great veins (superior vena cava and inferior vena cava, as well as the pulmonary veins).
Jun 11, 2024 · The external structure of the heart includes several key components: Pericardium. The pericardium is a double-walled sac that encloses the heart. It has two layers: A tough outer layer (fibrous pericardium) that protects the heart and anchors it to surrounding structures.
Describe the internal and external anatomy of the heart; Identify the tissue layers of the heart and pericardium; Relate the structure of the heart to its function as a double pump; Compare atrial and ventricular systole and diastole; Compare systemic circulation to pulmonary circulation
