Species difference

SPECIES DIFFERENCES

Sheep and Goat

  • It resembles that of ox
  • The pleural sacs form a cul-de-sac on each side of the first lumbar vertebra
  • Perforations are present in the cranial mediastinum of the sheep and it is not perforated in goat

Horse

  • The thoracic cavity is larger
  • The pleura are thin and the caudal mediastinum appears fenestrated and when these apertures are present the two-pleural sacs communicate with each other
  • The apertures do not exist in the fetus

Pig

  • The thorax is rounded due to strongly curved ribs
  • The pleural sacs extend forward to the first intercostals space
  • The diaphragmatic line of pleural reflection begins at or a little above the sternal end of the seventh and extends in a gentle curve to about the middle of the last rib
  • When a fifteenth rib present, it does not affect the arrangement of the pleura of the diaphragm

Dog

  • Thorax is proportionately larger
  • Mediastinum is imperforate, but permeable to gas and water
  • Both right and left cupola pleurae extend beyond the cranial border of the first rib

Rabbit

  • General plan resembles the ox

Fowl

Last modified: Friday, 16 December 2011, 3:17 AM