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 Medioventral 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.