Species difference

LUNGS
(Sheep, Goat, Horse, Pig, Dog, Rabbit, Fowl)

Sheep and Goat

  • It resembles those of ox but differ from them in shape. There is a cardiac notch
  • Lobulation is much less distinct than in the ox

TOP

Horse

  • The lungs of the horse are not divided by deep fissures, as in case of most mammals
  • The left lung consists of a chief part -the body and an apex. In addition to these, the right lung has an intermediate lobe
  • The lobulation of the lung is not very evident on account of the small amount of interlobular tissue
  • The trachea is not adherent to the lung
  • The cardiac notch is larger in the right lung than the left
  • Behind the root of the lung, the two lungs are adherent to each other on the triangular area. Behind the area of adhesion the mediastinal pleura forms a fold called the pulmonary ligament (ligament of lung)

TOP

Pig

  • The right lung has four lobes- apical, cardiac, diaphragmatic and intermediate
  • In some cases, apical lobe is divided into two parts. Sometimes it is fused with cardiac lobe
  • Lobulation is distinct
  • The apical bronchus is present for the right apical lobe at the level of 3 rd rib

TOP

Dog

  • The costal surface of lungs is convex
  • Lobulation is not distinct
  • Interlobular fissures are deep and extend to the root
  • The right lung has four lobes and left has three
  • The cardiac notch is larger on the right side than on the left

    TOP

  • Right lung has 4 distinct lobes- apical, cardiac, diaphragmatic and intermediate lobes
  • The left lung has only two lobes; apico-cardio and diaphragmatic lobes 

TOP

Fowl

  • They are small and occupy the dorsal part of the thorax. They are intimately adherent to the ribs and the costal impressions are deeper
  • The stem bronchus enters the ventral surface of the lung about its middle. It continues backwards through the lungs and opens into the abdominal air sacs
  • Within the lungs, the stem bronchus gives off secondary bronchi, which enter the cervical, clavicular and thoracic air sacs
  • Numerous tertiary bronchi radiate towards the periphery

TOP
Last modified: Saturday, 21 April 2012, 5:56 AM