The<unk> s are located in the isthmus of the fauces, between the palatoglossal arch and the palatopharyngeal arch of the soft palate. The<unk>  is one of the mucosa-associated lymphoid tissues (MALT), located at the entrance to the upper respiratory and gastrointestinal tracts to protect the body from the entry of exogenous material through mucosal sites. In consequence it is a site of, and potential focus for, infections, and is one of the chief immunocompetent tissues in the oropharynx. It forms part of the Waldeyer's ring, which comprises the adenoid, the paired tubal<unk> s, the paired<unk> s and the lingual<unk> s. From the pharyngeal side, they are covered with a stratified squamous epithelium, whereas a fibrous capsule links them to the wall of the pharynx. Through the capsule pass trabecules that contain small blood vessels, nerves and lymphatic vessels. These trabecules divide the<unk>  into lobules. Blood supply and innervation The nerves supplying the<unk> s come from the maxillary division of the trigeminal nerve via the lesser<unk>  nerves, and from the<unk> lar branches of the glossopharyngeal nerve. The glossopharyngeal nerve continues past the<unk>  and innervates the posterior 1/3 of the tongue to provide general and taste sensation. This nerve is most likely to be damaged during a<unk> lectomy, which leads to reduced or lost general sensation and taste sensation to the posterior third of the tongue. Blood supply is provided by<unk> lar branches of five arteries: the dorsal lingual artery (of the lingual artery), ascending<unk>  artery (of the facial artery),<unk> lar branch (of the facial artery), ascending pharyngeal artery (of the external carotid artery), and the lesser<unk>  artery (a branch of the descending<unk>  artery, itself a branch of the maxillary artery). The<unk> s venous drainage is by the peritonsillar plexus, which drain into the lingual and pharyngeal veins, which in turn drain into the internal jugular vein.<unk> lar crypts Low-power microscope magnification of a cross-section through one of the<unk> lar crypts (running diagonally) as it opens onto the surface of the throat (at the top). Stratified epithelium (e) covers the throat's surface and continues as a lining of the crypt. Beneath the surface are numerous nodules (f) of lymphoid tissue. Many lymph cells (dark-colored region) pass from the nodules toward the surface and will eventually mix with the saliva as salivary corpuscles (s).<unk> s consist of approximately 15 crypts, which result in a large internal surface. The<unk> s contain four lymphoid compartments that influence immune functions, namely the reticular crypt epithelium, the extrafollicular area, the mantle zones of lymphoid follicles, and the follicular germinal centers. In human<unk> s, the very first part exposed to the outside environment is<unk> lar epithelium.
Palatine tonsil
Cauliflower ear
Oral torus
Periorbita
Symphytum
Adina
Danger triangle of the face
Clitoral hood