epicardium and mayocardium definition in short
Answers
Answer:
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 diaphragm. It is surrounded by a fluid-filled sac called the pericardium, which serves to protect this vital organ.
The Layers of the Heart Wall
The heart wall is composed of connective tissue, endothelium, and cardiac muscle. It is the cardiac muscle that enables the heart to contract and allows for the synchronization of the heartbeat. The heart wall is divided into three layers: epicardium, myocardium, and endocardium.
Epicardium: the outer protective layer of the heart.
Myocardium: muscular middle layer wall of the heart.
Endocardium: the inner layer of the heart.
Answer:
Epicardium: the outer protective layer of the heart. Myocardium: muscular middle layer wall of the heart. Endocardium: the inner layer of the heart.