Fig. 3: Lateral view of sheep skull.

Lateral view of the sheep skull (a, b) showing the maxillary sinuses. Incisive bone (1), nasal process (2) of (1), maxilla (3), zygomatic bone (4), lacrimal bone (5), nasal bone (6), supraorbital foramen (7), infraorbital foramen (8), facial tubercle (9), lacrimal bulla (10), dorsal limit of the maxillary sinus (11), ventral limit of the maxillary sinus (12), caudal limit of the maxillary sinus (13), the trephination site of the maxillary sinus (14*), lateral chamber of the maxillary sinus (15), medial chamber of the maxillary sinus (16), infraorbital canal (17), lacrimal sinus (18), second pre‐molar tooth (p2), second molar tooth (m2). Image reproduced with permission from Awaad et al. ‘Surgical anatomy of the nasal and paranasal sinuses in Egyptian native sheep (Ovis aries) using computed tomography and cross sectioning’, Anat Histol Embryo, 2019, Wiley [54].