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The heart has its own special covering, a lining of two layers of fibrous tissue called the
The wall of each chamber is composed of cardiac muscle tissue usually referred to as the
Structures that separate the chambers and permit the flow of blood in one direction only are called
The four structures that compose the conduction system of the heart are the
SA node, AV node, AV bundle, and Purkinje fibers.
What is the term used to describe the severe chest pain that occurs when the myocardium is deprived of oxygen?
Blood flow from the heart through blood vessels to all parts of the body and back to the heart is called
During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein?
It flows into the inferior vena cava.
The normal cardiac impulse that initiates mechanical contraction of the heart arises in the
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