Histology of the heart

Question 1

What is the outermost layer of the heart called?

Answer 1

Visceral pericardium

Question 2

What type of epithelium is pericardium?

Answer 2

Simple squamous

Question 3

What is the function of purkinje fibres?

Answer 3

To transmit electrical impulses

Question 4

How do myocytes of the SA node differ from normal myocytes?

Answer 4

They have no intercalated discs

Question 5

What types of cells line the mitral valve?

Answer 5

Endothelial cells

Question 6

Where in the heart are the “nodules of arantius” found?

Answer 6

In the aortic valve cusps

Question 7

What yellow/brown pigment accumulates in cardiac myocytes with increasing age?

Answer 7

Lipofuscin

Question 8

Name 3 features of the coronary arteries?

Answer 8

Are muscular arteries
Arise in the root of the aortic valve
Run in the epicardium

Question 9

Where are “Weibel-Palade bodies” located and what do they contain?

Answer 9

Found in endothelial cells - they contain Von Willebrand factor (as well as other clotting factors).

Question 10

What 3 ‘things’ definitely do not contain lymphatics?

Answer 10

Cartilage, Bone marrow and the Eye