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Where is the Tunica Intima Located ? What type of muscle can be found in this layer ?
superior to the basal lamina
What is the Tunica media chiefly made up of ? what separates the Intima from the media ? What are pericytes ?
Smooth Muscle , Type III reticular , elastic fibers , collagen fibers , proteoglycans .
Internal elastic Lamina
They represent post and regular capillaries .
What type of collagen is seen in the Tunica Adventitia ?
What is the Vaso Vorum ?
It is the vessels of vessels , that can be seen throughout the Adventitia
What type of muscle is found in the blood vessels ? Why are they innervated with nerves ?
So that they can dilate and constrict them.
What are pericytes ?
Pericytes are contractile cells that wrap around the endothelial cells of capillaries and venules throughout the body.
What are continuous capillaries ?
They are capillaries that lack fenestrae , but they are full pinocytotic vesicles on both surface , in muscles , nervous tissue , exocrine glands.
Blood brain barrier
What are fenestrated vessels ?
they have large diaphragms , continuous basal lamina . Seen in tissues with rapid exchange , endocirne , kidneys , intestine .
What kind of capillary does the Renal glomerulus have ?
Fenestrated Capillary with no Diaphragms
What are sinusoidal capillaries ?
Macrophages located in the outside and inside of the capillary , no basal lamina
in liver , bone marrow , Spleen
What can alter the function of capillaries ?
Poison , inflammation , chemicals ,
What are some the metabolic functions of capillaries ?
Activation - angiotensin
Inactivation - makes compounds inert
Where are Weible-Palade granules present (with blood- clotting factor VIII) ?
An “Internal Elastic Lamina” is prominent, is associated with what type of arteries ?
What can found at the Adventitia layer ?
- Elastic fibers -
- Fibroblasts -
- Adipose cells -
- Vasa vasorum
Large elastic arteries include what ?
Include “aorta” and its large branches
What is an " Aneurysm " ?
Weakening of media of artery
What is Artheroclerosis ?
Focal thickening of the Intima and deposition of Cholesterol
What are infarcts ?
blocking of artery resulting in necrosis .
usually seen in the cerebrum , kidneys , or heart
What are the carotid bodies ?
structures at the bifurcation of the common carotid artery
They act as chemo-receptors for pH, oxygen , etc.