Transcript Taste Receptors - Waxbarashada.com

Taste Receptors
Taste buds are distributed in oral
cavity,pharynx and larynx the lingual taste
buds are present on the lateral and dorsal
borders of the tongue and associated with the
papillae
There are four types of tongue
papillae
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1-filiform papillae
2-fungifome papillae
3-circumvallate papillae
4-foliate papillae
Filiform papillae are the most numerous these are
present on the dorsum of the anterior and posterior
region of the tongue these papillae do not contain taste
buds so they have no gustatory function the fungiform
papillae contain one or more taste buds their upper
surface. These are prtesent on anterior two thirds of the
tongue
The circumvallates papillae
• The circumvallates papillae are present at
the junction of oral and pharyngeal parts of
the tongue taste buds are located on the
sides of the papillae
foliate papillae
• The foliate papillae are found on the
posterior, lateral border of the tongue
these papillae consist of series of folds
forming clefts in the tongue surface so the
taste buds are found in the epithelium of
the cleft wall
Dynamic proper’s of taste buds
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• Taste bud are replaced regularly and rapidly
during the taste cells migrate from the periphery
to the center of the bud another important
property of taste buds in their ability to
regenerate if gustatory nerve is transectioned it
results in disappearance of the taste buds
innervated by that nerve once the nerve
regenerates the taste buds reappear
Termination of gustatory afferent
fibers
• Termination of gustatory afferent fibers
• Gustatory afferent fibers from facial XII)
(IX gloss pharyngeal) and (X vague)
terminate in uncles the cell bodies of three
XII, IX, X
Speech
• Speech
• The larynx play an important role in speech
besides larynx muscles from Abdominal wall to
the lips, teeth ,nasal cavities and respiratory
spaces all these take part in speech. Collectively
they are called as vocal tract the vocal cord
vibrate and produce sound. Depending on the
Age ,sex , the total range of vibration frequency
for speech is B/w 60-500 cycles per second
average control of speech
• second the average control of speech
frequency is about 100 for a male ,200 for
females and 250 for children the
positioning of the fauces ,tongue, soft
palate and teeth modify the parameters of
vocal tract consonants are associated with
particular anatomy sites from which they
are associated in terminology of phonetics
the P and B are labial , T and D are Dental
M and N are nasal
• nasal the Anatomical changes in the
larynx and it’s resonating vocal tract are
only small fraction of second the
combination of larynx,pharynx, hyoid,
palatal and muscles are combined in
rapidly changing combination with the
teeth in mechanics of phonation and
articulation of speech in this way the oral
cavity helps in speech
Lsyli
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1- give a list oral Anatomy
2- what are the Oral Functions
3 Discuses initial Function of Saliva
4-Define Oral Physiology
5-Enamurete Muscles which take parte
speech
• 6- sheg Gobolka ugu dagmoyinka badan
somalia