Cavities

Question 1

Boundaries and structures in the thoracic cavity?

Answer 1

Superior: thoracic outlet (root of the neck), T1 vertebrae, manubrium, 1st rib
Inferior: diaphragm, cabal opening T8, esophageal hiatus T10, aortic hiatus T12
Bony wall: ribs 1-12

Question 2

Boundaries and structures in the abdominal cavity

Answer 2

Superior: diaphragm, caval opening T8, esophageal hiatus T10, aortic hiatus T12
Inferior:pelvic inlet, sacral promontory, sacral alar line, iliac arcuate line, pubic superior ramus , pubic symphysis
Bony wall:ribs 1-12

Question 3

Boundaries and structures in the pelvic cavity

Answer 3

Superior: pelvic inlet, sacral promontory, sacral alar line, iliac arcuate line, pubic superior ramus , pubic symphysis
Inferior: pelvic diaphragm, levator ani (puborectalis,Pubococcygenus,iliococcygenus) and coccygenus
Bony wall: 2 innominate bones, sacrum, (posterior:2 sacroiliac joints) (anteriorly: pubic symphysis) sacrotuberous ligament and sacrospinous ligament