Blood supply of the heart
2023年7月13日 · The blood supply to the heart arises from the left and right semilunar cusps of the aortic valve (respectively): The left coronary artery gives rise to the anterior interventricular (left anterior descending) and the left circumflex arteries. The left circumflex becomes the posterior interventricular artery in a few cases
Human cardiovascular system - Heart Wall, Blood Flow, …
The wall of the heart consists of three distinct layers—the epicardium (outer layer), the myocardium (middle layer), and the endocardium (inner layer). Coronary vessels supplying arterial blood to the heart penetrate the epicardium before entering the myocardium.
Vasculature of the Heart - TeachMeAnatomy
2024年1月8日 · There are two main coronary arteries which branch to supply the entire heart. These are the left and right coronary arteries which arise from the left and right coronary sinuses within the aorta respectively.
The Heart Wall - TeachMeAnatomy
2024年1月4日 · The heart wall itself can be divided into three distinct layers – the endocardium, myocardium, and epicardium. In this article, we shall look at the anatomy and clinical relevance of these layers.
Coronary Arteries: Anatomy and Function - Cleveland Clinic
2022年5月9日 · Coronary arteries supply blood to the heart. They branch off your aortic root, and wrap around the heart while some dive into the muscle to bring it blood.
Biology of the Heart - Biology of the Heart - The Merck Manuals
To ensure that blood flows in only one direction, each ventricle has an "in" (inlet) valve and an "out" (outlet) valve. In the left ventricle, the inlet valve is the mitral valve, and the outlet valve is the aortic valve. In the right ventricle, the inlet valve is the tricuspid valve, and the outlet valve is the pulmonic (pulmonary) valve.
The 3 Layers of the Heart Wall - ThoughtCo
2024年7月26日 · Along with the circulatory system, the heart works to supply blood and oxygen to all parts of the body. The heart is located in the chest cavity just posterior to the breastbone, between the lungs, and superior to the diaphragm. It is surrounded by a fluid-filled sac called the pericardium, which serves to protect this vital organ.
Blood supply to the heart - Encyclopedia Britannica
Because of the watertight lining of the heart (the endocardium) and the thickness of the myocardium, the heart cannot depend on the blood contained in its own chambers for oxygen and nourishment. It possesses a vascular system of its own, called the coronary arterial system.
17.1C: Layers of the Heart Walls - Medicine LibreTexts
Due to their continuous rhythmic contraction, cardiomyocytes require a dedicated blood supply to deliver oxygen and nutrients and remove waste products such as carbon dioxide from the cardiac muscle tissue. This blood supply is provided by the coronary arteries.
Anatomy, Thorax, Heart Coronary Arteries - StatPearls - NCBI Bookshelf
2023年7月24日 · Their main function is to supply blood to the heart. This is a crucial function for myocardial function and subsequently homeostasis of the body. The arrangement of coronary arteries varies among people significantly. There are two primary coronary arteries, the right coronary artery (RCA) and the left main coronary artery (LMCA).