Pericardium/heart layers

Question 1

what are the 3 pericardial layers the heart sits in and there location?

Answer 1

Fibrous pericardium- tough outer covering that attaches the heart to the diaphragm. It protects and anchors the heart from over stretching.
Serous pericardium (2 layers) - the parietal layer (outer layer) and visceral layer (internal layer) aka Epicardium. The space in between the serous pericardium is the pericardial cavity that contains pericardial fluid.

Question 2

what is pericardial fluid?

Answer 2

serous fluid produced allows the heart to beat in a relatively friction less state.

Question 3

what are the 3 layers of the epicardium?

Answer 3

epicardium- ( same as the visceral pericardium)
myocardium - thickest layer of the heart. located in the middle and contains Cardiac Muscle Tissue.
endocardium-innermost layer of the heart. Has “simple squamous epithelium”. aka Endothelium and it continues with enetering and exiting blood vessels.

Question 4

what are 4 cardiac muscle tissue characteristics?

Answer 4

is striated, involuntary, contains intercalated discs, and usually uni-nucleated.