IV. The pharynx ([p. 231]). Remove the large lymphatic gland between the atlantal transverse process and the larynx. Clean the outer surface of the pharynx. Dissect the muscles of the pharynx ([p. 232]) as follows:
(a) The inferior constrictor ([Fig. 96], k).
(b) The middle constrictor ([Fig. 96], j).
(c) The glossopharyngeus ([Fig. 96], i).
(d) The stylopharyngeus ([Fig. 96], l).
The superior constrictor cannot well be seen at this point; it will be examined later.
Disarticulate the cranial cornu of the hyoid from the bulla tympani and make an incision the length of the lateral wall of the pharynx so as to expose its cavity; study. Examine its opening into the mouth-cavity and study the general description ([p. 231]). Find and study the soft palate ([p. 230]). Dissect the tensor and levator palatini muscles ([p. 230], and [Fig. 66], d and e, [p. 112]), using, if necessary, the specimen on which the other muscles were dissected. Then slit the soft palate lengthwise at one side of the median line to expose the nasopharynx ([p. 231]). Bring the choanæ into view by use of a bit of mirror-glass. Pass a bristle into the nares and out at the choanæ. Pass a bristle through the Eustachian tube into the middle ear.
V. Œsophagus ([p. 234]). After completing the study of the pharynx, leave the larynx and lungs in position and by displacing them toward the right follow the œsophagus to its termination. Open it to see the folds of the mucosa.
VI. Cut through the duodenum at its distal end and through the duodenal mesentery so as to separate the stomach and duodenum, with the liver, pancreas, and spleen, from the remainder of the alimentary canal. Float the parts in a dish of water.
VII. Study the stomach ([p. 234], and [Fig. 97]). Cut out the ventral wall of the stomach and wash it out, so as to study its cavity, and then continue the cut so as to expose the pyloric valve ([p. 235]).