What is pharyngeal isthmus?
isthmus of pharynx passage posterior to the soft palate by which the nasopharynx and oropharynx communicate (i.e., the junction of nasopharynx and oropharynx), closed during swallowing by elevation of the soft palate and contraction of the posterior fascicle of palatopharyngeus (muscle), forming a Passavant cushion.
What is the meaning of a isthmus?
An isthmus is a narrow strip of land that connects two larger landmasses and separates two bodies of water.
What is a isthmus in anatomy?
Medical Definition of isthmus : a contracted anatomical part or passage connecting two larger structures or cavities: as. a : an embryonic constriction separating the midbrain from the hindbrain. b : the lower portion of the uterine corpus.
Where does the word isthmus come from?
Isthmus first surfaced in the 1550s and was derived from both the Latin word isthmus and Greek word isthmos. Isthmos, more or less, had the same meaningÔøΩ a narrow neck of land between two seas.
Where is the oropharyngeal isthmus located?
The isthmus of the fauces or the oropharyngeal isthmus is a part of the oropharynx directly behind the mouth cavity, bounded superiorly by the soft palate, laterally by the palatoglossal arches, and inferiorly by the tongue.
What does fauces mean in English?
: the narrow passage from the mouth to the pharynx between the soft palate and the base of the tongue.
Which country is an example of an isthmus?
One of the most famous examples of the isthmus landform is the Isthmus of Panama. The Panama isthmus is a narrow strip of land that connects Costa Rica and Colombia. Essentially, the Isthmus of Panama connects North and South America. It is bordered by the Caribbean Sea and the Pacific Ocean.
What is isthmus and its function?
function. In fallopian tube. The isthmus is a small region, only about 2 cm (0.8 inch) long, that connects the ampulla and infundibulum to the uterus. The final region of the fallopian tube, known as the intramural, or uterine, part, is located in the top portion (fundus) of the uterus;…
What does the oropharyngeal isthmus do?
isth·mus of fau·ces the constricted and short space that establishes the connection between the cavity of the mouth and the oropharynx, bounded anteriorly by the palatoglossal folds and posteriorly by the palatopharyngeal folds; the lateral well is the tonsillar fossa.
Where is the tonsillar pillar?
Anterior tonsil pillar This is the fold of tissue just in front of the tonsils. It is created by the palatoglossus muscle which extends from the soft palate down to the tongue.
What does Otitic mean?
inflammation of the ear
otitic in British English (əʊˈtɪtɪk) adjective. relating to an inflammation of the ear.
Where is the Isthmus of the pharynx?
isthmus of pharynx. passage posterior to the soft palate by which the nasopharynx and oropharynx communicate (i.e., the junction of nasopharynx and oropharynx), closed during swallowing by elevation of the soft palate and contraction of the posterior fascicle of palatopharyngeus (muscle), forming a Passavant cushion.
What is the definition of an isthmus in geography?
An isthmus is a narrow strip of land that connects two larger landmasses and separates two bodies of water. Term
What did the Europeans call the west coast isthmus?
European settlers, who quickly saw the isthmus’ potential for trade along the west coast of North America as well as across the Pacific, collective ly referred to these Native Americans as the Duwamish. Tombolos are a type of isthmus. A tombolo forms as tide s and wave s create a thin strip of land between a coastal island and the mainland.
How does the Panama Canal relate to the Isthmus of Panama?
The Isthmus of Panama in Panama links the continent s of North and South America, and separates the Pacific and Atlantic Ocean s. The Panama Canal stretches 77 kilometers (48 miles) across the isthmus, and allows cargo ships to travel from eastern North America to western North America without having to go around South America.