Ch 13 - Part 1  Heart Electrical Conduction System
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Questions and Answers

The ______ valves open when ventricular pressure is greater than arterial pressure and close when the ventricles relax and stop contracting.

semilunar

The ______ valves are much more cartilaginous than the floppy AV valves.

semilunar

The ______ is the thickest layer of cardiac muscle tissue, found in the middle of the wall.

myocardium

The ______ is responsible for the heart's ability to contract and produce a pumping force.

<p>myocardium</p> Signup and view all the answers

The ______ is the inside lining of the heart, and is an arrangement of simple squamous epithelial tissue.

<p>endocardium</p> Signup and view all the answers

The ______ forms the top layer of the heart and is also formed from simple squamous epithelial tissue.

<p>epicardium</p> Signup and view all the answers

The ______ is a 'sac' that sits around the heart and helps to ensure that the heart stays in position within the mediastinum.

<p>pericardium</p> Signup and view all the answers

The ______ contains serous fluid, which is oily and allows for the organs to slide by each other without causing any friction.

<p>pericardium</p> Signup and view all the answers

The ______ might be compared to a pillowcase.

<p>pericardium</p> Signup and view all the answers

The ______ is continuous with the endothelium lining the blood vessels in the body.

<p>endocardium</p> Signup and view all the answers

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