. The anatomy of the horse, a dissection guide. Horses. 176 THE ANATOMY OF THE HORSE. distributed mainly to the gland of the same name, but it sends some twigs to the upper eyelid. The Orbital Branch of the Superior Dental Artery creeps over the lower part of the rim of the orbit, and descends to anastomose with the submaxillary artery. It gives some twigs to the lower eyelid. Nerves. The sensory nerves of the eyelids are derived from the supra-orbital and palpebro-nasal branches of the ophthalmic division of the 5th cranial nerve, and from the orbital branch of the superior maxillary division
. The anatomy of the horse, a dissection guide. Horses. 176 THE ANATOMY OF THE HORSE. distributed mainly to the gland of the same name, but it sends some twigs to the upper eyelid. The Orbital Branch of the Superior Dental Artery creeps over the lower part of the rim of the orbit, and descends to anastomose with the submaxillary artery. It gives some twigs to the lower eyelid. Nerves. The sensory nerves of the eyelids are derived from the supra-orbital and palpebro-nasal branches of the ophthalmic division of the 5th cranial nerve, and from the orbital branch of the superior maxillary division of the 5th. The supra-orbital nerve emerges by the foramen of the same name, and is distributed to the upper eyelid, and to skin around its point of exit. The palpebro-nasal nerve sends a branch to supply the lower lid and the structures at the inner canthus. The orbital branch of the superior maxillary division of the 5th nerve is distributed in the neighbourhood of the outer canthus. The motor nerve to the orbicularis comes from the 7th, which crosses internal to the nasal canthus. The motor nerve to the levator palpebree comes ft'om the 3rd, but cannot be reached at present. THE FACE. The Nostrils, or the Inferior or Anterior Naees. Some points in connection with these may conveniently be noticed before the student proceeds to dissect the face. The nostril is the entrance to the nasal chamber or fossa—the first segment of the respiratory passages. It is a large, somewhat oval opening bounded laterally by the alee, ox wings, of the nostril. The alse meet above and below, forming the com- missiires, the lower of which is wide and rounded, while the upper is acute. The outer ala is concave -in the whole of its extent; but the inner ala, while concave below, forms a 1,1. comma-like cartilages of the nostril; 2. Septal cartilage. COnvex projection cloSe tO the upper commissure. If now the inner wing be manipulated, it will be felt to contain a piece of cartilage which begins a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjecthorses, bookyear1884
