Ninja Nerd - Circulatory System | Veins of the Head & Neck | Flow Chart
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Questions and Answers

What is the lining of dural sinuses?

  • Epithelial cells
  • Muscle cells
  • Connective tissue
  • Endothelial cells (correct)

    • Where is the occipital sinus located?

  • In the lower part of the falx cerebri
  • Below the frontal bone
  • In the upper part of the falx cerebri
  • Above the occipital bone (correct)

    • What is the final destination of the blood from the inferior sagittal sinus, occipital sinus, and superior sagittal sinus?

  • Sigmoid sinus
  • Straight sinus
  • Internal jugular vein (correct)
  • Transverse sinus

    • What is the major contributor to the cavernous sinus?

    <p>Sphenoid parietal sinus</p> Signup and view all the answers

    Where does the superior petrosal sinus empty into?

    <p>Sigmoid sinus</p> Signup and view all the answers

    What is the final destination of the blood from the sigmoid sinus?

    <p>Internal jugular vein</p> Signup and view all the answers

    What receives blood from the facial vein?

    <p>Cavernous sinus</p> Signup and view all the answers

    What vein is formed by the fusion of the subclavian vein and the internal jugular vein?

    <p>Brachiocephalic vein</p> Signup and view all the answers

    Where does the superior vena cava empty into?

    <p>Right atrium</p> Signup and view all the answers

    What type of blood is carried by the superior vena cava?

    <p>Deoxygenated blood</p> Signup and view all the answers

    Study Notes

    Dural Sinuses

    • Dural sinuses are veins found within the space between the periosteum and meningeal layer of the dura mater
    • They are lined with endothelial cells
    • Examples of dural sinuses:
      • Inferior sagittal sinus: located in the lower part of the falx cerebri
      • Occipital sinus: located within the skull, above the occipital bone
      • Superior sagittal sinus: located in the upper part of the falx cerebri

    Venous Drainage of the Head and Neck

    • The inferior sagittal sinus, occipital sinus, and superior sagittal sinus all empty into the straight sinus
    • The straight sinus empties into the transverse sinus
    • The transverse sinus empties into the sigmoid sinus
    • The sigmoid sinus empties into the internal jugular vein

    Cavernous Sinus

    • The cavernous sinus receives blood from:
      • Ophthalmic vein: drains the orbit
      • Facial vein: drains the nose and lips
      • Sphenoid parietal sinus: a major contributor to the cavernous sinus
    • The cavernous sinus drains into:
      • Superior petrosal sinus: empties into the sigmoid sinus
      • Inferior petrosal sinus: empties into the internal jugular vein

    Internal Jugular Vein

    • The internal jugular vein receives blood from:
      • Sigmoid sinus
      • Inferior petrosal sinus
      • Facial vein
      • Superficial temporal vein
      • Superior thyroid vein
      • Middle thyroid vein
    • The internal jugular vein empties into the subclavian vein

    Brachiocephalic Vein

    • The brachiocephalic vein is formed by the fusion of the subclavian vein and the internal jugular vein
    • There are two brachiocephalic veins: right and left
    • The right and left brachiocephalic veins fuse to form the superior vena cava

    Superior Vena Cava

    • The superior vena cava is formed by the fusion of the right and left brachiocephalic veins
    • The superior vena cava empties into the right atrium
    • The superior vena cava carries deoxygenated blood from the head and neck to the heart

    Dural Sinuses

    • Located between the periosteum and meningeal layer of the dura mater
    • Lined with endothelial cells
    • Examples:
      • Inferior sagittal sinus: in lower part of falx cerebri
      • Occipital sinus: in skull, above occipital bone
      • Superior sagittal sinus: in upper part of falx cerebri

    Venous Drainage of the Head and Neck

    • Inferior sagittal sinus, occipital sinus, and superior sagittal sinus drain into straight sinus
    • Straight sinus drains into transverse sinus
    • Transverse sinus drains into sigmoid sinus
    • Sigmoid sinus drains into internal jugular vein

    Cavernous Sinus

    • Receives blood from:
      • Ophthalmic vein: drains orbit
      • Facial vein: drains nose and lips
      • Sphenoid parietal sinus: major contributor
    • Drains into:
      • Superior petrosal sinus: empties into sigmoid sinus
      • Inferior petrosal sinus: empties into internal jugular vein

    Internal Jugular Vein

    • Receives blood from:
      • Sigmoid sinus
      • Inferior petrosal sinus
      • Facial vein
      • Superficial temporal vein
      • Superior thyroid vein
      • Middle thyroid vein
    • Empties into subclavian vein

    Brachiocephalic Vein

    • Formed by fusion of subclavian vein and internal jugular vein
    • Two brachiocephalic veins: right and left
    • Right and left brachiocephalic veins fuse to form superior vena cava

    Superior Vena Cava

    • Formed by fusion of right and left brachiocephalic veins
    • Empties into right atrium
    • Carries deoxygenated blood from head and neck to heart

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    Description

    This quiz covers the anatomy of dural sinuses, including their location and function, as well as the venous drainage of the head and neck.

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