MORPHOLOGICAL STUDY OF THE AIR SACS IN (Colombialavia Domestica) PIGEONS

Abstract

The aim of this study wasto study the morphology of the air sacs (Saccipneumatici) in mature pigeons (Colombialavia Domestica). Post euthanized the birds; cold acrylic was injected by way of trachea and left several days for polymerization. Then they were macerated with 3% potassium hydroxide at 40 °C, cleaned with tap water, colored and examined. The cervical air sacs are paired sacs. They communicated with the lung via the first Medio- ventral secondary bronchi grow and had two diverticula. Clavicular air sac was formed by the fusion of the bilaterally diverticula and had connection with the lungs through the third Medio-ventral bronchi. The cranial thoracic air sacs were smaller than the caudal sacs pneumatising the second to seventh ribs by their diverticula. The caudal thoracic air sacs had no diverticulum. The left abdominal air sac consists of two parts cranial and caudal.