10 Questions
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.
myocardium
The ______ is the inside lining of the heart, and is an arrangement of simple squamous epithelial tissue.
endocardium
The ______ forms the top layer of the heart and is also formed from simple squamous epithelial tissue.
epicardium
The ______ is a 'sac' that sits around the heart and helps to ensure that the heart stays in position within the mediastinum.
pericardium
The ______ contains serous fluid, which is oily and allows for the organs to slide by each other without causing any friction.
pericardium
The ______ might be compared to a pillowcase.
pericardium
The ______ is continuous with the endothelium lining the blood vessels in the body.
endocardium
Test your knowledge on the electrical conduction system of the heart. Learn about the pathway of electrical signals from the SA node to the ventricles, and the analogy of squeezing blood out of the heart like toothpaste out of a tube.
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