19.3 Short Answer Questions
1) Inflammation of the heart's myocardium is called ________.
2) The sequence of pericardial layers from superficial to deep is the fibrous, ________, and visceral pericardium.
3) The right atrium receives blood from the superior vena cava, inferior vena cava, and ________.
4) A heart valve that fails to close properly is considered to be ________ or to exhibit insufficiency.
5) Irregular ridges in the walls of the ventricles are called ________.
6) The walls of the ________ are thicker so as to push blood through the systemic circuit.
7) The ________ valve prevents backflow of blood from the left ventricle to the left atrium.
8) The atrioventricular valves cannot be inverted because attachment of ________.
9) The first heart sounds of "lub-dup" are produced by the closing of the right and left ________.
10) The ________ of the heart prevents overdilation of the valve openings.
11) The ________ are subdivisions of the atrioventricular bundle located within the upper half of the interventricular septum.
12) The ________ artery supplies the left atrium and the posterior part of the left ventricle.
13) Gap junctions and fasciae adherens are associated with ________ that join adjacent cardiac muscle cells.
14) The technique called ________ uses a balloon catheter to expand stenotic coronary arteries.
15) Uncoordinated contractions of the ventricle, known as ________, result from irregularities in conducting system behavior.