WebMay 11, 2024 · The heart is an extraordinary organ. It is about the size of a clenched fist, weighs about 10.5 ounces and is shaped like a cone. 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 … WebLayers of the Heart The heart wall consists of 3 layers: Epicardium: thin external layer formed by visceral layer of serous pericardium Myocardium: thick middle layer made of cardiac muscle Endocardium: thin internal membrane that lines the heart and its valves.
Chapter 19: HEART Flashcards Quizlet
WebThe heart is composed of three layers; the epicardium, the myocardium, and the endocardium, illustrated in Figure 1. The inner wall of the heart has a lining called the endocardium. The myocardium consists of the heart muscle cells that make up the middle layer and the bulk of the heart wall. WebThe electrical stimulus travels down through the conduction pathways and causes the heart's ventricles to contract and pump out blood. The 2 upper chambers of the heart (atria) are stimulated first and contract for a short … chirurg near me
Anatomy and Function of the Heart
WebApr 12, 2024 · The myocardium is functionally the main constituent of the heart and the thickest layer of all three heart layers. It is a muscle layer that enables heart contractions. Histologically, the myocardium is comprised … WebMay 17, 2024 · Describe the location and position of the heart within the body cavity; 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 ... WebEach side of the heart consists of an atrium and a ventricle which are two connected chambers. The atria (plural of atrium) are where the blood collects when it enters the heart. chirurg montabaur