The Cardiac Muscle

question 257

Multiple Choice

The cardiac muscle

• A) extracts oxygen and nutrients from the blood within its chambers.
• B) receives its blood supply primarily during ventricular systole when blood is forced into the vessels supplying the heart.
• C) receives its blood supply as the blood returning to the heart from the lung passes through the cardiac circulation before being pumped to the systemic circulation.
• D) receives most of its blood supply during ventricular diastole by means of the coronary circulation.
• E) none of these answers.

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