Volume 3

Hand atlas of human anatomy / by Werner Spalteholz ; edited and translated from the fourth German edition by Lewellys F. Barker.

  • Spalteholz, Werner, 1861-1940.
Date:
[1906?]
Catalogue details

Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: Hand atlas of human anatomy / by Werner Spalteholz ; edited and translated from the fourth German edition by Lewellys F. Barker. Source: Wellcome Collection.

    14/420 (page 478)
    ^Dorsum nasi ^ Basis nasi ^ Ala nasi ^ Margo nasi Philtriim Labium superiiis Bucca ■[Mala] Angulus oris Eima oris Labium inferius' Sulcus mentolabialis'^ Apex nasi v Nares Sulcusjnasolabialis Tuberculum labii superioris ^Mentum 513. The mouth-slit and its surroundings. The caYiim oris (mouth cavity) (see Figs. 516, 517 and 543) is the beginning of the apparaUis diyestorius (digestive tube) but serves also as a path for the respiratory air and for the formation of sounds of speech. It opens in front through the mouth-slit; in front it is bounded by the mucous membrane of the lips, lateralward by that of the cheeks, above by the palate, below by the tongue and by the mucous membrane which extends from the under surface of the tongue to the gums; behind it is connected by the isthmus faucium with the pharynx. The processus alveolares of the upper jaw-bones and the pars alveolaris of the lower jaw-bone with the teeth fixed in them separate an anterior and lateral, narrow portion (vcsti- bulum oris) from the month cavity proper fcavum oris proprium). Tlie yestibulum oris when the mouth is closed and lips and teeth in contact, is a vertically placed slit, which is connected with the mouth-cavity proper only by means of the minute spaces between the teeth and by a somewhat larger space between the hinderniost molar teeth and the anterior margin of the ramus of the lower jaw. The lips (labia oris) (see also Figs. 514—516, 538 and 543) are folds which are covered on the outer surface by skin, on the inner by the tunica mucosa oris and which contain, between these, the m. orbicularis oris (see p. 245). As upper and lorver lip (labium superius, labium inferius) they bound the rima oris (mouth-slit) and go over into one another on each side, lateralward from its extremity (angulus oris, angle of the mouth), by means of the com- missura labiorum. In the median plane from the posterior surface of each a small per- pendicular fold of mucous membrane (frenulum labii superioris, frenulum labii inferioris) extends to the anterior surface of the jaw-bones. Between the muscular layer and the mucous membrane in the tela submucosa lie numerous mucous glands (glandulae labiales), some as large as a pea; their ducts open upon the surface of the mucous membrane.