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Anastomoses definitions Flashcards

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Anastomoses definitions
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  • Anastomosis
    The convergence point of blood vessels, crucial for forming collateral channels to maintain blood flow despite vessel compromise.
  • Collateral Channel
    Alternative pathways for blood to reach its destination, vital when a primary vessel is blocked or damaged.
  • Arterial Anastomosis
    Convergence of arteries, often found near joints and vital organs, providing alternative blood pathways.
  • Venous Anastomosis
    Convergence of veins, more common than arterial, offering extensive collateral circulation.
  • Arteriovenous Anastomosis
    Direct connections between arteries and veins, bypassing capillaries, crucial for blood rerouting.
  • End Blood Vessel
    Non-anastomosing vessel with poor collateral circulation, making tissue death likely if obstructed.
  • Capillary
    Smallest blood vessels where exchange of substances occurs, often bypassed in arteriovenous anastomoses.
  • Vascular Shunt
    A type of arteriovenous anastomosis in mesenteries, allowing blood to bypass capillaries.
  • Precapillary Sphincter
    Muscle ring controlling blood flow into capillaries, can constrict to reroute blood in arteriovenous anastomoses.
  • Collateral Circulation
    Network of collateral channels ensuring blood supply despite blockages, more extensive in veins.
  • Blood Clot
    A blockage in a blood vessel that can compromise blood flow, necessitating collateral channels.
  • Plaque
    Build-up in blood vessels that can obstruct flow, highlighting the importance of collateral channels.
  • Flexion
    Movement that can compromise blood flow in joints, necessitating arterial anastomoses.
  • Mesenteries
    Serous membranes of the digestive system, containing vascular shunts as examples of arteriovenous anastomoses.
  • Frostbite
    Condition resulting from blood rerouting away from extremities in cold, due to arteriovenous anastomoses.