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Cardiovascular System (Layers of the
heart ((Epicardium. The epicardium…
Cardiovascular System
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Anatomy of the heart
The heart is a muscular organ roughly the size of a closed fist. It sits in the chest, slightly to the left of center. As the heart contracts, it pumps blood around the body. It carries deoxygenated blood to the lungs where it loads up with oxygen and unloads carbon dioxide, a waste product of metabolism
The heart is made up of four chambers: two upper chambers known as the left atrium and right atrium and two lower chambers called the left and right ventricles. It is also made up of four valves: the tricuspid, pulmonary, mitral and aortic valves
It has four parts, the left ventricle and the right ventricle which are both at the bottom of the heart, and the left atrium and the right atrium at the top. A wall of muscle called the septum separates them.
Your heart is actually a muscular organ. An organ is a group of tissues that work together to perform a specific function. In the case of your heart, this function is pumping blood throughout your body. Additionally, the heart is largely made up of a type of muscle tissue called cardiac muscle.
Layers of the
heart
The wall of the heart consists of three layers: the epicardium (external layer), the myocardium (middle layer) and the endocardium (inner layer). The epicardium is the thin, transparent outer layer of the wall and is composed of delicate connective tissue
Epicardium. The epicardium is the outermost layer of the heart wall and is just another name for the visceral layer of the pericardium. ...
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Endocardium .the thin, smooth membrane which lines the inside of the chambers of the heart and forms the surface of the valves.
The middle layer of the heart wall is the myocardium; this is the actual muscular layer of the heart responsible for contracting and pumping blood throughout your body. The endocardium is the thin innermost layer of tissue that makes direct contact with the blood pumping through the heart chambers.
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