In human anatomy, the vertebral column (Latin − Columna vertebralis) (backbone or spine) is a column usually consisting of 24 articulating vertebrae, and 9 fused vertebrae in the sacrum and the coccyx. It is situated in the dorsal aspect of the torso, separated by intervertebral discs. It houses and protects the spinal cord in its spinal canal.

There are normally thirty-three (33) vertebrae in humans, including the five that are fused to form the sacrum (the others are separated by intervertebral discs) and the four coccygeal bones that form the tailbone. The upper three regions comprise the remaining 24, and are grouped under the names cervical (7 vertebrae), thoracic (12 vertebrae) and lumbar (5 vertebrae), according to the regions they occupy. This number is sometimes increased by an additional vertebra in one region, or it may be diminished in one region, the deficiency often being supplied by an additional vertebra in another. The number of cervical vertebrae is, however, very rarely increased or diminished.

A diagram of a human thoracic vertebra. Notice the articulations for the ribs

With the exception of the first and second cervical, the true or movable vertebrae (the upper three regions) present certain common characteristics that are best studied by examining one from the middle of the thoracic region.

(Source: mortisia)

  1. blackkeysoul reblogged this from spiralsnotcircles
  2. spiralsnotcircles reblogged this from mortisia
  3. the-me-in-anatomy reblogged this from mortisia
  4. abungibusleo reblogged this from mortisia
  5. eldalai reblogged this from mortisia
  6. awesomemormomaggie reblogged this from mortisia
  7. betweenunseen reblogged this from julias-collection
  8. julias-collection reblogged this from as-is-i
  9. geenboy reblogged this from mortisia
  10. alinktotheaghast reblogged this from the-lord-of-the-force
  11. the-lord-of-the-force reblogged this from mortisia
  12. virginsacrifices reblogged this from mortisia
  13. bigtopdropout reblogged this from mortisia
  14. solitaryspirit reblogged this from the-hidden-dagger
  15. uknowheh reblogged this from the-hidden-dagger
  16. the-hidden-dagger reblogged this from mortisia
  17. samologyy reblogged this from glyp
  18. datxerneass reblogged this from undertakertalbot
  19. undertakertalbot reblogged this from mortisia
  20. agameoflifeordeath reblogged this from mortisia
  21. septempermental reblogged this from mortisia
  22. mydarlingrobot reblogged this from mortisia
  23. glyp reblogged this from mortisia
  24. inthemoodformedicine reblogged this from enhanceandescape
  25. enhanceandescape reblogged this from mortisia
  26. myregurgitatedthoughts reblogged this from serialkillersandchainsaws
  27. lauraeelizabeth reblogged this from mortisia
  28. himmelgrau reblogged this from mortisia
  29. dreaminglillies reblogged this from corruptedbyvanity
theme by oohcamila