pharynx

(fâr`ĭngks), area of the gastrointestinal and respiratory tracts which lies between the mouth and the esophagus. In humans, the pharynx is a cone-shaped tube about 4 1-2 in. (11.43 cm) long. At its upper end, it is continuous with the mouth and nasal passages, and connects with the ears via the Eustachian tubesEustachian tube
[for Bartolomeo Eustachi], a hollow structure of bone and cartilage extending from the middle ear to the rear of the throat, or pharynx, technically known as the pharyngotympanic or auditory tube.
..... Click the link for more information. . The lower end of the pharynx is continuous with the esophagus (see digestive systemdigestive system,
in the animal kingdom, a group of organs functioning in digestion and assimilation of food and elimination of wastes. Virtually all animals have a digestive system. In the vertebrates (phylum Chordata, subphylum Vertebrata) the digestive system is very complex.
..... Click the link for more information. ). It is also connected to the larynx by an opening that is covered by the epiglottis during swallowing, thus preventing food from entering the trachea. The pharyngeal area is the embryological source of several important structures in vertebrates. For example, the breathing apparatus (gill pouches of fish and lungs of land animals) arises in this area (see respirationrespiration,
process by which an organism exchanges gases with its environment. The term now refers to the overall process by which oxygen is abstracted from air and is transported to the cells for the oxidation of organic molecules while carbon dioxide (CO₂
..... Click the link for more information. ). In humans, the pharynx is particularly important as an instrument of speech: it functions with the various parts of the mouthmouth,
entrance to the digestive and respiratory tracts. The mouth, or oral cavity, is ordinarily a simple opening in lower animals; in vertebrates it is a more complex structure.
..... Click the link for more information. to articulate the initial sounds produced in the larynxlarynx
, organ of voice in mammals. Commonly known as the voice box, the larynx is a tubular chamber about 2 in. (5 cm) high, consisting of walls of cartilage bound by ligaments and membranes, and moved by muscles. The human larynx extends from the trachea, or windpipe.
..... Click the link for more information. .

Pharynx

A chamber at the oral end of the vertebrate alimentary canal, leading to the esophagus. In adult humans it is divided anteriorly by the soft palate into a nasopharynx and an oropharynx, lying behind the tongue but anterior to the epiglottis; there is also a retropharyngeal compartment, posterior to both epiglottis and soft palate. The nasopharynx receives the nasal passages and communicates with the two middle ears through auditory tubes. The retropharynx leads to the esophagus and to the larynx, and the paths of breathing and swallowing cross within it. See Esophagus, Larynx

Pharynx

in all chordates and man, the entoderm-lined portion of the foregut behind the oral cavity in which the gill slits develop.

In anamniotic chordates the gill slits open to the exterior; water passes through them and washes over the gills. In lower chordates the number of gill slits varies from two (for example, in Salpa and Appendicularia) to several hundred (for example, in Ascidia). Lower chordates that feed passively (that is, that receive food with the current of water, such as tunicates and lancelets) have a special pharyngeal apparatus for capturing food particles—the endostyle, a groove on the ventral side of the pharynx that is lined with ciliated epithelium containing muciparous adenoblasts. Food particles adhere to the mucus and are transported to the intestine by the undulating epithelial cilia. Among the vertebrates only the larvae of lampreys (ammocoetes) have an endostyle. In vertebrates the pharynx is supplied with powerful striated muscle and innervated by the glossopharyngeal and vagus nerves. Five to 17 pairs of gill slits develop in the walls of the pharynx of Agnatha, and five to eight pairs in fishes. The rudiments of gill slits—the saclike beginnings of the branchial pouches—can be found in the embryos of all terrestrial vertebrates. The lungs develop from the terminal pair of gill pouches. The thymus and thyroid glands, and in terrestrial vertebrates the parathyroid gland as well, are derivatives of the pharyngeal epithelium. In fishes the pharynx leads to the esophagus. In terrestrial vertebrates, with the development of pulmonary respiration and the formation of a middle ear, the esophagus, larynx, and eustachean tubes have separate openings into the pharynx. In addition, in connection with the formation of a hard and soft palate, internal nares (choanae), which in amphibians and most reptiles and birds open into the oral cavity, in mammals open into the upper, so-called nasopharyngeal, section of the pharynx. The opening of the pharynx into the oral cavity in mammals is called the mouth. The mouth is bounded above by the soft palate, below by the radix linguae, and laterally by two pairs of palatine arches, between which lie large lymph nodes— the tonsils.

In invertebrates the pharynx is an isolated muscular section of the foregut, joining the mouth (sometimes the oral cavity) with the esophagus. It is lined (in contrast to that of the chordates) with epithelial cells of ectodermal origin.

A. N. DRUZHININ

The pharynx in man is the first section of the gastrointestinal tract, which joins the oral cavity with the esophagus. It performs functions of swallowing and breathing. The pharynx is located behind the nasal and oral cavities and communicates below with the larynx and, through the eustachean (auditory) tubes, with the right and left tympanic cavities. It consists of a funnel-shaped muscular pouch, extending from the base of the skull to the seventh cervical vertebra, where it passes into the esophagus. The length of the pharynx in the adult is approximately 12 cm and its maximum width, 5 cm. The pharynx is divided into three sections—the upper section, or nasopharynx, which serves only for respiration; the middle section, or oropharynx; and the laryngeal section. The pharynx is lined interiorly with mucous membrane, which in turn is covered with a fibrous membrane. The muscular sheath is divided into an inner layer of longitudinal muscles (which raise the pharynx) and an outer layer of circular muscles (which constrict the pharynx). The connective-tissue adventitia lies over the muscle layer. The pharynx is innervated by branches of the glossopharyngeal, vagus, and sympathetic nerves, which constitute the pharyngeal plexus. The pharynx receives a rich blood supply from branches of the external carotid arteries. Blood drains principally into the internal jugular vein system, and lymph, into the postpharyngeal and superior deep cervical nodes.

V. V. KUPRIIANOV

pharynx

[′far·iŋks] (anatomy) A chamber at the oral end of the vertebrate alimentary canal, leading to the esophagus.

pharynx

the part of the alimentary canal between the mouth and the oesophagus

pharynx

[far´ingks] the throat; the musculomembranous cavity, about 5 inches (12.5 cm) long, behind the nasal cavities, mouth, and larynx, communicating with them and with the esophagus. It includes many individual structures and may be divided into three areas: the nasopharynx (top), oropharynx (center, behind the mouth), and laryngopharynx (bottom). The nasopharynx, connected with the nasal cavities, provides a passage for air during breathing and contains the openings of the eustachian tubes through which air enters the middle ear. The oropharynx and laryngopharynx provide passageways for both air and food. The pharynx also functions as a resonating organ in speech.
The pharynx is separated from the mouth by the soft palate and its fleshy V-shaped extension or flap, the uvula, which hangs from the top of the back of the mouth, above the root of the tongue. In swallowing, the uvula lifts up, closing off the nasopharynx as food passes from the mouth through the lower parts of the pharynx to the esophagus. On each side of the entrance to the pharynx from the mouth, and behind the nasal passage, are the tonsils and adenoids, masses of lymphoid tissue.

phar·ynx

, gen.

pha·ryn·gis

, pl.

pha·ryn·ges

(far'ingks, fă-rin'jis, fă-rin'jēz), [TA] Avoid the misspelling/mispronunciatoin pharnyx. Do not confuse this word with fornix.The superior expanded portion of the alimentary tract, between the mouth and nasal cavities (superiorly and anteriorly) and the esophagus (inferiorly); consisting of nasopharynx, oropharynx, and laryngopharynx, the first two being shared with the respiratory tract; the pharnyx is distinct from the rest of the alimentary tract in being composed exclusively of voluntary skeletal muscle arranged in outer circular and inner longitudinal layers. [Mod. L. fr. G. pharynx (pharyng-), the throat, the joint opening of the gullet and windpipe]

pharynx

(făr′ĭngks)n. pl. pharynges (fə-rĭn′jēz) or pharynxes The section of the digestive tract that extends from the mouth and nasal cavities to the larynx, where it becomes continuous with the esophagus.

phar·ynx

, pl. pharynges (far'ingks, fă-rin'jēz) [TA] The upper expanded portion of the digestive tube, between the esophagus below and the mouth and nasal cavities above and in front.

pharynx

The common passage to the gullet (OESOPHAGUS) and the windpipe (TRACHEA) from the back of the mouth and the back of the nose. The pharynx is a muscular tube lined with MUCOUS MEMBRANE, and consists of the NASOPHARYNX, the OROPHARYNX and the LARYNGOPHARYNX.

pharynx

the canal leading from the mouth to the oesophagus in vertebrates. In humans, the upper pharynx includes the nasal section divided off by the soft palate and the lower pharynx which includes the mouth and throat. In protochordates it is that part of the gut system into which the gill slits open internally.

Pharynx

The pharynx is the part of the throat that lies between the mouth and the larynx or voice box.Mentioned in: Sore Throat, Swallowing Disorders, Velopharyngeal Insufficiency

phar·ynx

, pl. pharynges (far'ingks, fă-rin'jēz) [TA] Superior expanded portion of alimentary tract, between mouth and nasal cavities (superiorly and anteriorly) and esophagus (inferiorly); consisting of nasopharynx, oropharynx, and laryngopharynx.

Patient discussion about pharynx

Q. what should i take for a sorrow throat? A. There are many types of tablets you can take under your tongue that help relieve the pain, and you can get them over the counter. You should see a doctor if the sore throat continues longer than 1-2 days, to makw sure there is no possible bacterial infection involved in which case you will need antibiotics.

Q. what is throat cancer exactly? does it mean you lose your voice?A. is there a chance to keep a healthy voice after troat cancer treatments at all? any known cases?

Q. My friend think she has strep in her throat. What should she do. She doesn't want to take antibiotics. Her glands are swollen and she feels kinda out of it. Any more information or links would be greatly appreciated. A. she should go to a Dr. that will take a look and a swab of the area. if he'll suspect a Strep. he'll give her antibiotics before getting results. it's important to follow antibiotic instructions ("10 days, 3 times a day"..).those infection can progress to other organs like the heart valves (very common) and cause chronic heart failure.

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Synonyms for pharynx

noun the passage to the stomach and lungs

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