Gross anatomical and morphometrical study of the nasal cavity (cavum nasi) of Egyptian goat (Capra hircus) and Egyptian Baladi dog (Canis lupus)

This study provides sufficient information on the anatomical investigation and the morphometrical analysis of the nasal cavity of Egyptian goat and Egyptian Baladi dog. The sagittal and the cross (transverse) sections at the different levels were performed on twenty heads of those animals. The nasal cavity was typically cone-shape in goat and a slight narrow elongated cone-shape in dog. It was completely divided by the nasal septum in both species except the caudal part of the nasal cavity of goat was partially divided. The nostril of the goat was nearly horizontal slit-like in form, directed ventromedially toward the philtrum. Whereas, the nostril of the dog was somewhat comma-shaped with its wide part directed medially toward the nasal septum. In the sagittal section, the nasal conchae were included in goat and dog, the dorsal nasal concha, the ventral nasal concha, the middle nasal concha and the ethmoidal conchae. The dorsal nasal concha was the longest concha in both animals. In the cross section, the dorsal nasal concha in goat was formed the dorsal conchal sinus at the level of the third premolar teeth and caudally extended into the frontal sinus. The ventral nasal concha was not formed sinus but its spiral lamellae enclosed the recesses. Moreover, the middle conchal sinus was appeared at the level of the first molar teeth. In this section, all the nasal conchae of dog were formed recesses (conchal sinuses absent).