Author
Abstract
The present study has been out to examine macroscopic structure of the
primary bronchi and lung in Bee-eaters bird ( Merops orientalis) observed exist
within the rib cage, the distal part of the trachea are divided into two primary bronchi
(left and right) and the macroscopic appearance of the primary bronchi consists of a
short tube extend caudally from syrinx to enter the proximal third of the visceral
surface of the lungs through the hilus. The basic unit consisting of the primary bronchi
are cartilaginous rings which takes - C - shape. The mean total length of left and right
primary bronchi are (1.025 ± 0.15 cm) and (1.075 ± 0.14 cm); and the number of
cartilaginous rings in left and right primary bronchi are ( 18.5 ± 0.50) and (18.5 ±
1.50). The lungs are small, pyramidal-shaped, unlobed, bright pink color, and
surrounded by thin colorless membrane the pleura and the air sacs. The lung contains
two surfaces (dorsal and ventral), two borders ( medial and lateral) and two
extremities ( proximal and distal ). The mean total length, width and thickness of the
right lung are (1.77 ± 0.17 cm), (0.95 ± 0.15 cm) and (0.4 ± 0.10 cm) while the mean
total length, width and thickness of the left lung are (1.6 ± 0.15 cm ), ( 0.9 ± 0.14 cm )
and (0.37 ± 0.02 cm ).
Keywords
)
