. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE (ESOPHAGUS, 377 COMPARISON OF THE PHARYNX OF MAN WITH THAT OF ANIMALS. In consequence of the smallness of the soft palate, the pharynx of Man is only a kind of channel between the mouth and the larynx and oesophagus. It is usually divided into three portions : a superior, the posterior nares, covered by ciliated epithelium; a middle, or guttural, and an inferior, or oesophageal; the two latter are covered with tesselated epithelium. The muscles are almost the same as in the Dog, being a portion of the palato-pharyn-
. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE (ESOPHAGUS, 377 COMPARISON OF THE PHARYNX OF MAN WITH THAT OF ANIMALS. In consequence of the smallness of the soft palate, the pharynx of Man is only a kind of channel between the mouth and the larynx and oesophagus. It is usually divided into three portions : a superior, the posterior nares, covered by ciliated epithelium; a middle, or guttural, and an inferior, or oesophageal; the two latter are covered with tesselated epithelium. The muscles are almost the same as in the Dog, being a portion of the palato-pharyn- geus, the superior, middle, and inferior constrictors, and a stylo-pharyngeal muscle. Below the sides of the pharynx, and between the pillars of the soft palate, are the amygdala: almond-shaped organs, whose surface sliows the openings of the follicles that, with the vessels and a little connective tissue, compose their substance. THE (ESOPHAGUS. (Figs. 178, 179.) Preparation.—Place the subject in the first or second position taneous cervical muscle from the left side; take away the corresponding anterior limb, and proceed to the excision of the ribs of this side, with the exception of the first. Afterwards dissect the vessels and nerves in the neighbourhood of the oesophageal canal, taking care to preserve their relations to each other. Form,—The oesophagus is a long, cylindrical, narrow, membranous canal, easily dilated for the greater part of its extent, and destined to convey the food from the pharynx to the stomach, and to complete the act of deglutition. Course,—This canal begins at the pharynx, and communicates with it by means of the pos- terior opening situated above the glottis. It afterwards descends behind the trachea to the middle of the neck, where it commences to deviate towards the left side of that tube, and enters the thoracic cavity by inclining towards the inner aspect of the first left rib. It soon after regains its situation above the trachea, passe
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectveterinaryanatomy
