Cardiovascular System

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Cardiovascular System
2014-03-01 22:52:02

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  1. Where is the Tunica Intima Located ? What type of muscle can be found in this layer ?
    superior to the basal lamina 

    Smooth Muscle
  2. 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 .
  3. What type of collagen is seen in the Tunica Adventitia ?
    Type I
  4. What is the Vaso Vorum ?
    It is the vessels of vessels , that can be seen throughout the Adventitia
  5. What type of muscle is found in the blood vessels ? Why are they innervated with nerves ?
    Smooth muscle 

    So that they can dilate and constrict them.
  6. What are pericytes ?
    Pericytes are contractile cells that wrap around the endothelial cells of capillaries and venules throughout the body.
  7. 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
  8. What are fenestrated vessels ?
    they have large diaphragms , continuous basal lamina . Seen in tissues with rapid exchange , endocirne , kidneys , intestine .
  9. What kind of capillary does the Renal glomerulus have ?
    Fenestrated Capillary with no Diaphragms
  10. What are sinusoidal capillaries ?
    Multiple fenestrations 

    Macrophages located in the outside and inside of the capillary , no basal lamina 

    in liver , bone marrow , Spleen
  11. What can alter the function of capillaries ?
    Poison , inflammation , chemicals ,
  12. What are some the metabolic functions of capillaries ?
    Activation - angiotensin

    Inactivation - makes compounds inert 

    Lipolysis -

    Antithrombogenic -
  13. Where are  Weible-Palade granules present (with blood- clotting factor VIII) ?
  14. An “Internal Elastic Lamina” is prominent, is associated with what type of arteries ?
    Muscular arteries
  15. What can found at the Adventitia layer ?
    • Collagen- 
    • Elastic fibers -
    • Fibroblasts - 
    • Adipose cells -
    • Lymphatics,
    • Vasa vasorum
    • Nerves
  16. Large elastic arteries include what ?
    Include “aorta” and its large branches
  17. What is an " Aneurysm " ?
    Weakening of media of artery
  18. What is Artheroclerosis ?
    Focal thickening of the Intima and deposition of Cholesterol
  19. What are infarcts ?
    blocking of artery resulting in necrosis .

    usually seen in the cerebrum , kidneys , or heart
  20. What are the carotid bodies ?
    structures at the bifurcation of the common carotid artery

    They act as chemo-receptors for pH, oxygen , etc.