Physiology
Textbooks
Boundless Anatomy and Physiology
Cardiovascular System: The Heart
Physiology Textbooks Boundless Anatomy and Physiology Cardiovascular System: The Heart
Physiology Textbooks Boundless Anatomy and Physiology
Physiology Textbooks
Physiology

Section 1

The Heart

Book Version 29
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
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7 concepts
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Anatomy of the Heart

The heart is an organ responsible for pumping blood through the blood vessels using rhythmic contractions of cardiac muscle.

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Pericardium

The pericardium is a thick, membranous, fluid-filled sac which encloses, protects, and nourishes the heart.

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Layers of the Heart Walls

The heart wall is comprised of three layers: the outer epicardium, the middle myocardium, and the inner endocardium.

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Chambers of the Heart

The heart has four chambers. The two atria receive blood into the heart and the two ventricles pump blood into circulation.

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Great Vessels of the Heart

Great vessels are the major vessels which directly carry blood into or out of the heart.

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Myocardial Thickness and Function

The myocardium (cardiac muscle) is the thickest section of the heart wall and contains cardiomyocytes, the contractile cells of the heart.

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Fibrous Skeleton of the Heart

The cardiac skeleton, also known the heart's fibrous skeleton, consists of dense connective tissue in the heart that separates the atria from the ventricles.

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