Answers

HEART

#17 Heart, Sagittal Section (Mallory-Azan)

Is the myocardium thicker in the atrium or ventricle? Why? The myocardium is thicker in the ventricle. The ventricle must create more force when contracting to deliver blood to the lungs (right ventricle) or the entire body (left ventricle), whereas the atrium only has to deliver blood to the ventricle.

QUESTIONS

  1. What are the three layers of the heart? Endocardium (inner), myocardium (middle, comprised of cardiac muscle), epicardium (outer).
  2. What types of capillaries are depicted on the covers of this manual and where might such capillaries be found? Front cover (fenestrated: endocrines, mucosa of gut, gall bladder) and inside the back cover (continuous: muscle, brain, lung)
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