Histology - Vasculature

Front 1

Capillary Types

Back 1

Capillary Types:

1.) Continuous

2.) Fenestrated
-holes through capillary
-continuous basal lamina

3.) Discontinuous
-holes through capillary
-basal lamina discontinuous

Front 2

Layers of Vessel Wall

Back 2

Layers of Vessel Wall: (Out to In)

1.) Tunica Externa (Adventitia)
-Vasa Vasorum in large vessels

2.) Tunica Media
-vary composition of elastic fibers : smooth muscle
-Arteries Big to Small:
-Elasticity decreases
-Smooth muscle increases

3.) Tunica Intima

Front 3

Pericytes

Back 3

Pericytes:

-cells around capillaries
-contractile function
-can function as stem cells for repair

Front 4

Arteries vs. Veins

Back 4

Arteries vs Veins

Veins:
-thinner walls
-thicker lumen
-valves (folds of tunica intima)

Front 5

Layers of Cardiac Wall

Back 5

Layers of Cardiac Wall:

1.) Pericardium
a.) Parietal Layer
b.) Visceral Layer (epicardium)

2.) Myocardium
-thickest in left ventricle

3.) Endocardium
a.) Subendocardium - some texts say separate layer (between Endocardium & Myocardium)
-Purkinje fibers in ventricle subendocardium

Front 6

Artery Pathology

Back 6

Artery Pathology:

1.) Atherosclerosis (degeneration of walls)
2.) Aneurysm
3.) Stroke
4.) Vasculitis

Front 7

Vein Pathology

Back 7

Vein Pathology:

1.) Phlebitis (inflammation of vein, usually clot-associated)
2.) Varicose Veins (valve insufficiency)