The Organs of the Senses and the Common Integument

From WikiMD free medical encyclopedia
Jump to: navigation, search

Anatomy > Gray's Anatomy of the Human Body > X. The Organs of the Senses and the Common Integument > 1. The Peripheral Organs of the Special Senses

Henry Gray (1821–1865). Anatomy of the Human Body. 1918.

X. The Organs of the Senses and the Common Integument THE ORGANS of the senses may be divided into ('a') those of the special senses of taste, smell, sight and hearing and ('b') those associated with the general sensations of heat, cold, pain, pressure, etc. 1. The Peripheral Organs of the Special Senses a. The Organs of Taste(Organon Gustus)

The peripheral gustatory or taste organs consist of certain modified epithelial cells arranged in flask-shaped groups termed gustatory calyculi (taste-buds), which are found on the tongue and adjacent parts. They occupy nests in the stratified epithelium, and are present in large numbers on the sides of the papillæ vallatæ (Fig. 850), and to a less extent on their opposed walls. They are also found on the fungiform papillæ over the back part and sides of the tongue, and in the general epithelial covering of the same areas. They are very plentiful over the fimbriæ linguæ, and are also present on the under surface of the soft palate, and on the posterior surface of the epiglottis.


FIG. 850– Vertical section of papilla foliata of the rabbit, crossing the folia. (Ranvier.) (Picture From the Classic Gray's Anatomy) Structure—Each taste bud is flask-like in shape (Fig. 851), its broad base resting on the corium, and its neck opening by an orifice, the gustatory pore between the cells of the epithelium. The bud is formed by two kinds of cells: supporting cells and gustatory cells. The supporting cells are mostly arranged like the staves of a cask, and form an outer envelope for the bud. Some, however, are found in the interior of the bud between the gustatory cells. The gustatory cells occupy the central portion of the bud; they are spindle-shaped, and each possesses a large spherical nucleus near the middle of the cell. The peripheral end of the cell terminates at the gustatory pore in a fine hair-like filament, the gustatory hair The central process passes toward the deep extremity of the bud, and there ends in single or bifurcated varicosities. The nerve fibrils after losing their medullary sheaths enter the taste bud, and end in fine extremities between the gustatory cells; other nerve fibrils ramify between the supporting cells and terminate in fine extremities; these, however, are believed to be nerves of ordinary sensation and not gustatory.


FIG. 851– Taste-bud, highly magnified. (Picture From the Classic Gray's Anatomy) Nerves of Taste—The chorda tympani nerve, derived from the sensory root of the facial, is the nerve of taste for the anterior two-thirds of the tongue; the nerve for the posterior third is the glossopharyngeal.

Gray's Anatomy Contents | Gray's Anatomy Subject Index

About Classic Gray's Anatomy

External Links

WikiMD Sponsors - W8MD Weight Loss, Sleep and MedSpa Centers

Pronounced weightMD, our state of the art W8MD weight loss, sleep, holistic IV nutrition and aesthetic medicine programs can help you not only to lose weight, and sleep better but also look your best! Since its inception in 2011, W8MD’s insurance physician weight loss program has successfully helped thousands of patients.

W8MD Weight Loss

W8MD’s Physician weight loss is unique in many ways with a comprehensive multidisciplinary approach to weight loss. Weight Loss Success Stories....

W8MD Sleep Services

Sleep medicine program uses state of the art technology to diagnose and treat over 80 different sleep disorders. W8MD Sleep Services…

W8MD Medical Aesthetic Services

Medical aesthetic program offers a wide variety of advanced laser skin treatments including oxygen super facials, photofacials and Affordable Botox. W8MD Aesthetic Services…

IM and IV nutrition therapy includes booster shots for B12, vitamin B complex, Vitamin C, Detox treatments and IV nutrition therapy. W8MD IV Nutrition…

W8MD weight loss | Philadelphia medical weight loss | NYC medical weight loss | NJ medical weight loss

W8MD Weight Loss, Sleep & Medical Aesthetics

Intro to W8MD Weight Loss, Sleep & Medical Aesthetics

Disclaimer: The entire contents of WIKIMD.ORG are for informational purposes only and do not render medical advice or professional services. If you have a medical emergency, you should CALL 911 immediately! Given the nature of the wiki, the information provided may not be accurate and or incorrect. Use the information on this wiki at your own risk! See full Disclaimers.WikiMD is supported by W8MD Weight loss, Poly-Tech Sleep & Medical Aesthetic Centers of America.