Comparisons of Lung Structure of Fully Developed Domestic Fowl With Duck, Through Orientation to Broiler Ascites

Sanjeev Kumar Shukla*, Shubhra Shukla and Jose Mathew

Department of Biotechnology, Bundelkhand University, Jhansi India.

Corresponding Author E-mail: sanjeevcloning@gmail.com

ABSTRACT: This comparative study of the structure in lungs of the fully developed female domestic fowl and the duck. In the avian lung gas exchanging region, while proportionally smaller than mammalian lung, competently manages respiration to meet the high active necessities of flapping flight. The domestic fowl has partially remunerated for this by raising the surface area for gas exchange per unit volume of exchange tissue. . In domestic bird the size of the lung per unit body weight is between 20 and 33% lesser than that of the wild bird. The blood-gas tissue barrier is about 28% thicker in the domestic fowl than in the duck, and this has led to a 25% lower anatomical diffusing ability for oxygen of the blood-gas tissue barrier per unit body weight in the domestic fowl. At hatching (day 21), with a thin blood-gas barrier and a large respiratory surface area, the lung is well ready for gas exchange. Gas exchange in the bird lung is better, in part, by an extremely thin blood-gas barrier. These structural characteristics may make the modern domestic fowl weak to stress factors such as elevation, cold, heat or air pollution by predisposing to hypoxaemia.

KEYWORDS: Lung; Domestic Fowl; Duck; Broiler

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