. The anatomy of the horse; a dissection guide. Horses. 218 THE ANATOMY OF THE HORSE. The Inferior Extremities of the nasal fossae are termed the inferior nares or, in common hmguage, the nostrils. They have already been described (page 176).. Fig. Transverse Section through the Nasal Chambers. 1. Anterior turbinated bone; 2. Posterior turbinated bone; 3. Anterior meatus; 4. Middle meatus; 5. Posterior meatus; 6. Septum nasi. The Superior Extremities are separated from the cranial cavity by the cribriform plate of the ethmoid bone, and are occnpied by the lateral masses of the same bone.
. The anatomy of the horse; a dissection guide. Horses. 218 THE ANATOMY OF THE HORSE. The Inferior Extremities of the nasal fossae are termed the inferior nares or, in common hmguage, the nostrils. They have already been described (page 176).. Fig. Transverse Section through the Nasal Chambers. 1. Anterior turbinated bone; 2. Posterior turbinated bone; 3. Anterior meatus; 4. Middle meatus; 5. Posterior meatus; 6. Septum nasi. The Superior Extremities are separated from the cranial cavity by the cribriform plate of the ethmoid bone, and are occnpied by the lateral masses of the same bone. Below and behind these are the superior nares—the large patent orifices by which the nasal fossae communicate with the pharynx, the right and left openings being separated by the vomer bone. The following openings into the nasal fossa should be found :— 1. The Opening of the Lachrymal Duct {ductus ad nasum).—Look for this on the floor of the nasal fossa, a few inches within the nostril. It is easily seen in the living animal, and has already been referred to in connection with the nostril (page 176). It is a small opening (about the same diameter as a goose quill) with a circular outline, having an appear- ance as if a small circle of skin had been punched out. The opening, it is to be observed, is on the skin, and not the mucous membrane, taking the presence of hair as distinguishing the former from the latter. The duct passes upwards beneath the mucous lining of the middle meatus until it enters the osseous tube that conducts it to join the lachrymal. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original McFadyean, John, Sir, 1853-1941. New York, Jenkins
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Keywords: ., bookcentury1800, bookdecade1880, booksubjecthorses, bookyear1884
