Body Wall and Surgical Approach

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Anonymous
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296292
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Body Wall and Surgical Approach
Updated:
2015-02-19 07:31:33
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Anatomy Body Wall
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Description:
Vet Med - Module 9
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  1. What are the boundaries of the thoracic cavity?
    • Cranial - thoracic inlet
    • Dorsal - thoracic vertebrae
    • Caudal - diaphragm
    • Ventral - sternum
    • Lateral - ribcage
  2. What are the boundaries of the abdominal cavity?
    • Cranial - diaphragm
    • Caudal - pelvic inlet
    • Dorsal - lumbar vertebrae
    • Ventral and lateral - muscular wall
  3. List the functions of the thoracic cavity
    • Provides support and protection for vital organs contained within
    • Plays an important role in respiration/breathing
    • Ribcage provides a large surface area for muscle attachment
  4. List the functions of the abdominal cavity
    • Provides support and protection for vital organs contained within
    • Plays an important role in respiration/breathing
    • Abdominal press
    • Movement of trunk (flexion and lateral movement)
  5. List the layers that you would incise through in the a) thoracic b) abdominal cavity
    • a) Skin and cutaneous trunci muscle, superficial fascia, deep fascia and muscle, ribcage and intercostal muscles, pleura
    • b) Skin and cutaneous trunci muscle, superficial fascia, deep fascia and muscle, peritoneum
  6. How many thoracic vertebrae and ribs are present in dogs?
    13 thoracic vertebrae and 13 pairs of ribs
  7. How many sternebrae are present in the dog?
    8
  8. What two structures are located at the proximal end of a rib?
    Head and tuberculum
  9. What is located at the distal end of a rib?
    Costal cartilage
  10. The boundary between the bone and costal cartilage is called the ...?
    costochondral junction
  11. Which ribs articulate with intersternebral cartilages?
    Ribs 1-9
  12. What do ribs 10-12 form?
    The costal arch
  13. What is rib 13 sometimes referred to as?
    The floating rib
  14. What does the head of ribs 1-10 articulate with?
    The caudal costal fovea of the vertebrae in front and the cranial costal fovea of the corresponding vertebrae
  15. What does the tuberculum of ribs 1-10 articulate with?
    The transverse process of the corresponding vertebrae
  16. What structures does rib 1 articulate with?
    T1 and C7
  17. How does the articulation of ribs 11-13 differ from that of ribs 1-10?
    The head and tuberculum of ribs 11-13 only articulate with the corresponding vertebrae
  18. Which ligament runs between the heads of corresponding pairs of ribs?
    The intercapital ligament
  19. What structures does the intercapital ligament merge with?
    The annulus fibrosis abd dorsal longitudinal ligament
  20. True or false: the intercapital ligament is present in all the ribs?
    False: it is only present in ribs 1-10
  21. Which ligament runs from the tuberculum of the rib to the transverse process of the vertebrae?
    Costo-transverse ligament
  22. Where is the radiate ligament located?
    Ventrally - it helps to hold the head of the rib
  23. What area of the ribcage is the diaphragm attached to?
    The last sternebrae - the xiphoid
  24. When the diaphragm contracts during inspiration what direction is the ribcage pulled in?
    Cranially and laterally
  25. When the diaphragm relaxes during expiration what direction is the ribcage pulled in?
    Caudally and medially
  26. What fills the intercostal spaces?
    Intercostal muscles
  27. What direction do the fibres run in the external/internal intercostal muscles?
    • External - caudoventral
    • Internal - cranioventral
  28. Where do the external/internal intercostal muscles extend to?
    • External - extend to the costochondral junction
    • Internal - extend to the sternum
  29. What is the function of the intercostal muscles?
    They ensure that the ribcage moves together during inspiration and expiration and therefore function as a single unit
  30. Where do the intercostal vein, artery and nerve run?
    Down the caudal aspect of the ribs to the costocondral junction where they branch to run down both aspects
  31. Where should you make a surgical incision through the intercostal space?
    Through the middle and not too far distally, to avoid damaging the intercostal VAN structures
  32. What artery dose the intercostal artery join?
    The internal thoracic artery
  33. List the components of the abdominal wall
    Linea alba, rectus abdominus, external abdominal oblique, internal abdominal oblique, transverse abdominus
  34. Where does the linea alba run to and from?
    From the sternum to the pubis
  35. Where does the rectus abdominus originate and insert?
    O - sternum, I - pelvis
  36. What direction do the muscles fibres run in for EAO, IAO and TA?
    • EAO - caudoventral
    • IAO - cranioventral
    • TA - dorsoventral
  37. What is the name of the slit like opening in the caudoventral region of the EAO?  And IAO?
    • The superficial inguinal ring
    • The deep inguinal ring
  38. What structures run through the inguinal canal in males/females?
    • Males - external pudendal artery and vein, genitofemoral nerve, testes, cremaster muscle, spermatic cord, blood supply
    • Female - external pudendal artery and vein, genitofemoral nerve, vaginal process

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