Exam 21: The Cardiovascular System: The Heart

Which describes the endocardium? a.Has single layer of epitheliumt b. Has layer of areolar connective tissue c.Epithelial cells are squamous d. Epithelial cells are cuboidal e. Has layer of smooth muscle tissue

Which surface feature marks the border between the atria and the ventricles?

The myocardium consists of multiple, interlocking layers of cardiac muscle tissue, with associated connective tissue, blood vessels, and nerves.

Each atrioventricular valve consists of the following: a ring of connective tissue that attaches to the fibrous skeleton of the heart; connective tissue cusps, which function to close the opening between the heart chambers; and chordae tendineae that attach the margins of the cusps to the papillary muscles of the heart wall.

Figure 21.1 Using the above figure, identify the labeled structure(s) in each of the following questions. -Identify the structure(s) indicated by Label O.

The diaphragm is attached to the inferior, pointed tip of the heart, called the ________, which points laterally.

Figure 21.3 Using the above figure, identify the labeled structure(s) in each of the following questions. -Identify the structure(s) indicated by Label E.

Since the heart is rotated slightly to the left, the anterior surface, consists primarily of both atria.

Figure 21.4 Using the above figure, identify the labeled structure(s) in each of the following questions. -Identify the structure(s) indicated by Label G.

The extensive connective tissue network, which encircles the bases of the pulmonary trunk and aorta and the valves of the heart, is called the ________ of the heart.

Figure 21.4 Using the above figure, identify the labeled structure(s) in each of the following questions. -Identify the structure(s) indicated by Label R.

Which features are described as prominent muscular ridges that extend along the inner surface of the right auricle and across the adjacent anterior wall of the right atrium?

The broad, superior portion of the heart is the ________.

Figure 21.2 Using the above figure, identify the labeled structure(s) in each of the following questions. -Identify the structure(s) indicated by Label A.

Structures in the heart that carry electrical signals from the SA node to the AV node are called ________.

Which of the following associations is correct?

Figure 21.5 Using the above figure, identify the labeled structure(s) in each of the following questions. -Identify the structure(s) indicated by Label C.

The right ventricle ________.

Figure 21.4 Using the above figure, identify the labeled structure(s) in each of the following questions. -Identify the structure(s) indicated by Label E.

Figure 21.1 Using the above figure, identify the labeled structure(s) in each of the following questions. -Identify the structure(s) indicated by Label L.