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Myocardium

The muscular substance of the heart; the middle of the three layers forming the outer wall of the human heart. Wiktionary

About the Myocardium

The myocardium of the heart wall is a working muscle that needs a continuous supply of oxygen and nutrients to function efficiently. For this reason, cardiac muscle has an extensive network of blood vessels to bring oxygen to the contracting cells and to remove waste products. NIH - National Cancer Institute

Terms to know

Coronary Blood Vessels
The vessels that deliver oxygen-rich blood to the myocardium are known as coronary arteries. The vessels that remove the deoxygenated blood from the heart muscle are known as cardiac veins.
Heart
The hollow, muscular organ that maintains the circulation of the blood.
Inferior Vena Cava
A large vein that empties into the heart. It carries blood from the legs and feet and from organs in the abdomen and pelvis.
Pulmonary Artery
The pulmonary artery and its branches deliver blood rich in carbon dioxide (and lacking in oxygen) to the capillaries that surround the air sacs.
Pulmonary Veins
The veins that return the oxygenated blood from the lungs to the left atrium of the heart.
Superior Vena Cava
The large vein that carries blood from the head, neck, arms, and chest to the heart.

Related conditions

Terms to know

Coronary Blood Vessels
The vessels that deliver oxygen-rich blood to the myocardium are known as coronary arteries. The vessels that...
Heart
The hollow, muscular organ that maintains the circulation of the blood....
Inferior Vena Cava
A large vein that empties into the heart. It carries blood from the legs and feet and from organs in the abdo...
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