239. The SUBMAXILLARY GLAND is situated within the lower jaw, anterior to its angle. Its excretory duct (Wharton’s) opens into the mouth by the side of the fræ´num lin´guæ, (bridle of the tongue.)
240. The SUBLINGUAL GLAND is elongated and flattened, and situated beneath the mucous membrane of the floor of the mouth, on each side of the frænum linguæ. It has seven or eight small ducts, which open into the mouth by the side of the bridle of the tongue.
Observation. In the “mumps,” the parotid gland is diseased. The swelling under the tongue called the “frog” is a disease of the sublingual gland.
Fig. 59.
Fig. 59. A side view of the face, œsophagus, and trachea. 1, The trachea (wind pipe.) 2, The larynx. 3, The œsophagus. 4, 4, 4, The muscles of the upper portion of the œsophagus forming the pharynx. 5, The muscle of the cheek. 6, The muscle that surrounds, the mouth. 7, The muscle that forms the floor of the mouth.
239. The submaxillary. 240. The sublingual. What observation respecting these glands? What does fig. 59 represent?
241. The PHARYNX is a membranous sac, situated upon the 116 upper portion of the spinal column. It extends from the base of the skull to the top of the tra´che-a, (windpipe,) and is continuous with the œsophagus. From the pharynx are four passages; one opens upward and forward to the nose, the second leads forward to the mouth, the third downward to the trachea and lungs, the fourth downward and backward to the stomach.