Lab Exam 1 - The Heart

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Which layer of the heart wall is composed of the tissue shown here?

myocardium

Identify the highlighted structure(s).

trabeculae carneae

Identify the highlighted structure.

tricuspid valve

Identify the highlighted structures.

chordae tendineae

Identify the highlighted vessel.

middle cardiac vein

Identify the highlighted structures.

papillary muscles

The highlighted vessel returns blood from the body to which chamber of the heart?

right atrium

What structure is highlighted?

right atrium

Identify the highlighted vessel.

right coronary artery

Identify the highlighted vessel.

small cardiac vein

Identify the highlighted structure.

aortic semilunar valve

Identify the three branches of the highlighted vessel.

brachiocephalic trunk, left common carotid artery, left subclavian artery

Identify the highlighted structures.

cardiac muscle cells

Identify the highlighted artery.

circumflex

The highlighted structure is a remnant of which structure in the fetus?

ductus arteriosus

Identify the highlighted vessel.

great cardiac vein

Identify the highlighted structures.

intercalated discs

Identify the highlighted structure.

pulmonary trunk

Identify the highlighted vessels.

right pulmonary veins

Which type of tissue lines the lumen of this vessel?

simple squamous epithelium

Which layer of an elastic artery contains the largest amount of elastic fibers?

tunica media

Is the highlighted structure closed during atrial systole, or during ventricular systole?

ventricular systole

How do the highlighted valve cusps function during a ventricular contraction?

They are held closed by the chordae tendineae to prevent blood from flowing back into the right atrium.


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