Human anatomy, including structure and development and practical considerations . unicate both with those of the dorsumof the tonjrue and with the j^dands near the anj^de (jf the jaw. Nerves.—Wx^ nervous supply is from the fifth and the jrlosso-pharyngeal.(The relations of the tonsils are given with those of the pharynx, page 1602.)The pharyngeal tonsil (Fig. 1353), sometimes called the third tonsil, is amedian mass of adenoid tissue in the postero-superior wall of the pharynx, whichreaches its greatest development in early childhood, generally dwindling after thetwelfth year. When well develo
Human anatomy, including structure and development and practical considerations . unicate both with those of the dorsumof the tonjrue and with the j^dands near the anj^de (jf the jaw. Nerves.—Wx^ nervous supply is from the fifth and the jrlosso-pharyngeal.(The relations of the tonsils are given with those of the pharynx, page 1602.)The pharyngeal tonsil (Fig. 1353), sometimes called the third tonsil, is amedian mass of adenoid tissue in the postero-superior wall of the pharynx, whichreaches its greatest development in early childhood, generally dwindling after thetwelfth year. When well developed, it lies below the occipital and the basi-sphenoid,nearly filling the space from the nasal septum to the back of the i)harynx and almosttouching on either side the folds made by the tubal cartilages. Its thickness in themedian line is nearly i cm. Thus without being hyj)ertrophied it nearly fills the naso-pharynx. The pharyngeal tonsil is a lobulated organ, the swellings being often regu- FiG. 1357. Foramen caecum Pituitary body Cartilage of septumVomer Permanent incisor. Cranio-pharyngeal canal Pharyngeal tonsilOccipital bonePharyngeal tonsil Anterior arch of atlas Genio-hyoid Mylo-h\oid Hyoid boneThyroid cartilage j Epiglottis Third cervical vertebra Ventricle of lar>nx Cricoid cartilage Anterior portion of mesial sagittal section of childs head, probably of about three years. Reduced one-fourth. larly arranged around a central depression ; consequently it presents many central one, which varies widely, is often improperly called the bursa has absolutely nothing to do with the canal from the mouth to the sella turcica,through which a process of the oral tissue passes in early foetal life to the pituitarybody (Fig. 1357), being decidedly behind that passage. Neither is it the true bursapharyngea, since this term is more properly applied to a structure of uncommonoccurrence,—namely, a still more posterior pocket in the mucous membrane leading
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
