. Cunningham's Text-book of anatomy. Anatomy. 1110 THE DIGESTIVE SYSTEM. developed in the child than in the adult, strengthens the cheek, and helps it to resist the effects of atmospheric pressure during the act of sucking. In the adult the remains of the pad can be distinctly made out under the anterior border of the masseter. Some small superficial lymph-glands lie on the superficial surface of the buccinator, com- municating with the vessels of the lips, while their efferent vessels pass onwards towards the parotid region. Palatum.—The palate forms the roof of the mouth, and separates the m
. Cunningham's Text-book of anatomy. Anatomy. 1110 THE DIGESTIVE SYSTEM. developed in the child than in the adult, strengthens the cheek, and helps it to resist the effects of atmospheric pressure during the act of sucking. In the adult the remains of the pad can be distinctly made out under the anterior border of the masseter. Some small superficial lymph-glands lie on the superficial surface of the buccinator, com- municating with the vessels of the lips, while their efferent vessels pass onwards towards the parotid region. Palatum.—The palate forms the roof of the mouth, and separates the mouth from the nasal cavities and nasal part of the pharynx. It is not confined to the mouth, but extends backwards also into the cavity of the pharynx, forming the division between the oral and the nasal pharynx. It terminates behind in a free conical projection, the uvula. It consists of two distinct portions, an anterior, forming the anterior two-thirds, which has a bony foundation (palatine processes of the maxillae and the horizontal parts of the palatine bones), and a posterior, forming the posterior third, with a fibrous basis; and they are termed the hard and the soft palate respectively. The palate is arched antero-posteriorly, and also transversely. The latter curvature is the more pronounced in the hard palate, but the shape and curvature of this portion depend upon the configuration of its bony foundation. The hard palate is, on the whole, horizontal in direction, both transversely and antero- posteriorly. The soft palate is, on the other hand, during rest, as, for instance, in quiet nasal breathing, very oblique in direction, and it shuts off the mouth from the nasal and largely from the oral parts of the pharynx. When, however, the soft palate is raised by the action of its muscles, it more nearly continues backwards the plane of the hard palate, and it projects across the cavity of the pharynx, forming a nearly complete partition between the oral and the nasal p
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