Histology: Cardiac Histology Flashcards Preview

Pathology > Histology: Cardiac Histology > Flashcards

Flashcards in Histology: Cardiac Histology Deck (10):
1

What chamber of the heart has the thickest layer?

Left Ventricle

2

What chamber of the heart has the thinnest layer?

Right Atrium

3

What is the endocardium and what makes it up?

• Innermost layer
• Composed of:
– Simple squamous epithelium (endothelium)
– Connective Tissue
– Subendocardium: in contact with cardiac muscle and contains small vessels, nerves, and Purkinje Fibers.

4

What are the Purkinje-Fibers?

• Impulse conducting fibers
• Large modified muscle cells

5

What is the thickest part of the heart wall?

Myocardium

6

What are intercalated disks?

– Junctional complexes that contain fascia adherens, desmosomes, and gap junction to provide connection and communication.
– Bind myocytes and allow ion exchange to facilitate electrical impulses to pass

7

What is the epicardium and what is it composed of?

• Outermost layer of the heart
• Composed of connective tissue with nerves, vessels, adipocytes and an outer layer of mesothelium
• Mesothelium secretes pericardial fluid
• Covers and protects the heart

8

What are the AV valves?

– 2 AV (mitral and tricuspid) in the chambers

9

What are the semilunar valves?

– 2 semilunar (aortic /pulmonary)

10

What are the 3 layers that comprise the cardiac valves?

– Spongiosa: loose collagen
– Fibrosa: dense core of connective tissue
– Ventricularis: dense connective tissue with many elastic and collagen fibers

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