nutrition

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Author:
mlamaste
ID:
36938
Filename:
nutrition
Updated:
2010-09-23 19:59:03
Tags:
nutrition
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Description:
nutrition cardiovascular system
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  1. Heart Wall is composed of three layers
    • endocardium (inner)
    • myocardium (middle)
    • epicardium (outermost)
  2. Endothelium is lined by
    simple squamous epithelium
  3. inner subendothelial layer is composed of?
    • dense irregular CT
    • collagen
    • elastic fibers
  4. outer subendothelial layer
    collagen and elastic fibers
  5. Cardiac valves have a central layer of ______ covered by ______?
    Dense CT, endothelium
  6. Myocardium is composed of _________, ________, ________, and ________?
    • Cardiac muscle cells
    • SA and AV nodes
    • Purkinje fibers
    • Cardiac skeleton
  7. In the myocardium between bundles of cardiac muscle cell there are ?
    • dense capillary mm.
    • lymph vessels
    • nerve fibers
    • interstitial CT
  8. SA and AV nodes are composed of ______ that are _____ with ______
    • nodal cells
    • modified cardiac m. cells
    • fewer myofibrils
  9. Cardiac skeleton parts
    • fibrous rings
    • fibrous triangle
    • fibrous part of the interventricular spetum
  10. Fibrous rings in the cardiac skeleton are located where?
    • surround the AV openings
    • surround the aorta and pulmonary trunk
  11. fibrous triangle is located?
    • in cardiac skeleton
    • between AV opening and the base of aorta
    • dense irregular CT(pigs cats)
    • fibrocartilage(dog)
    • hyaline cartilage(horse)
    • bone(large ruminants)
  12. Epicardium is _____ and contains ____, ______, ______, and ________
    • loose CT
    • blood vessels
    • nerves/ganglion
    • adipose tissue
  13. epicardium is lined externally by ______ this is called ______
    • simple squamous epithelium
    • visceral pericardium
  14. Partietal pericardium consists of ______ layer, ____ layer, and _____ layer
    • mesothelial
    • collagen
    • elastic fibers
  15. Pericardial cavity is the space between _____ and _____ pericardium
    visceral and parietal
  16. pericardial cavity contains ________ for ______
    • serous fluid
    • frictionless cardiac movement
  17. Elastic artery structure
    • tunica intima: thicker than other arteries (fine elastic fibers)
    • internal elastic membrane: indistinct
    • tunica media: thickest layer, concentrically arranged fenestrated elastic laminae
    • external elastic membrane: distinct
    • tunica externa:vasa vasorum, nervi vasorum
  18. Muscular arteries
    • tunica intima:simple squamous (collagen,elastic,smooth m)
    • internal elastic membrane: distinct
    • tunica media:thick, composed of smooth m. (circular,helical)
    • external elastic membrane:not always defined
    • tunica externa:vasa vasorum, nervi vasorum
  19. Arteriole structure
    • tunica intima: simple squamous, (collagen, elastic, smooth m.)
    • internal elastic membrane: fenestrated and disappears in smaller arterioles
    • tunica media:1-3 layers of smooth m.
    • external elastic membrane:absent
    • tunica externa:loose CT
  20. Capillary structure
    endothelial cells, basal lamina, pericytes, and adventitial CT (lacking around brain capillaries)

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