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I don’t like a teacher who gives a lot of homework.

Mrs. Smith smoked marijuana which is an illegal drug.

Which node triggers the contraction of the atrium?

Which orifice of the heart transports oxygenated blood?

The contraction phase of the cardiac cycle is called ______.

The right atrium is separated from the right ventricle by a wall called the ________.

The smallest of the arteries is called a(n)

Which valves open when the ventricular diastole begins?

The chamber of the heart that pump oxygenated blood to the body systems is the

The ______ of the heart is said to be the beginning of the pulmonary circulation, and the _______ of the heart is the end of systemic circulation.