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The Oral Cavity Proper - Coggle Diagram
The Oral Cavity Proper
is the area inside of the dental arches. In back of your last molar is a space that links the vestibule with the oral cavity proper.
Palate
is a Root of the mouth, forms a division between the nasal and oral cavities.
Hard Palate
it is an anterior portion of rooof of the mouth
hard palate separates the nasal cavity above from the oral cavity below .
The mucosa of the hard palate is tightly bound to the underlying bone, which is why submucosal injections into the palatal area can be extremely painful
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Soft Palate is the movable posterior third of the palate It has no bony support and hangs into the pharynx behind it , The soft palate ends with a pear-shaped hanging projection of tissue, called the uvula
The soft palate is supported posteriorly by two arches, the fauces
The anterior arch runs from the soft palate down to the lateral aspects of the tongue as the anterior faucial pillar.
The posterior arch is the free posterior border of the soft palate and is called the posterior faucial pillar
The opening between the two arches, called the isthmus of fauces, contains the palatine tonsil.
The tongue
is composed mainly of muscles. It is covered on top with a thick layer of mucous membrane and thousands of tiny projections called papillae. Inside the papillae are the sensory organs and nerves for both taste and touch. On a healthy tongue, the papillae are usually pinkish-white and velvety smooth.
functions
(1) speaking
(2) positioning food while eating
(3) tasting and tactile sensations
(4) swallowing
(5) cleansing the oral cavity
Divided
1) The anterior two thirds of the tongue, called the body, is found in the oral cavity.
2) The root of the tongue is the posterior part that turns vertically downward to the pharynx
3) The dorsum comprises the superior (upper) and posterior roughened aspects of the tongue. It is covered with small papillae of various shapes and colors
4) The sublingual surface of the tongue is covered with thin, smooth, transparent mucosa through which many underlying vessels can be seen
Floor of the tongue
The lingual frenum is the thin fold of mucous membrane that extends from the floor of the mouth to the underside of the tongue.
Two small papillae are seen on either side of the lingual frenulum (frenum) just behind the central incisors. Through these papillae into the mouth are the openings of the submandibular ducts. The saliva enters the oral cavity through these ducts.
Taste Buds
● The taste buds are the organs for the sense of flavors of food and that give us warning when foods are too hot .
● Located on the dorsum ( top side ) of the tongue .
● Saliva is necessary to stimulate the taste buds to detect flavors . If the mouth dry , can not be able to taste anything .
Types of Taste Buds
A. Fungiform papillae : contain taste buds
B. Vallate papillae : form a V on the posterior portion of the tongue.
C. Filiform papillae : cover the entire surface of the tongue , provide the sense of touch but do not contain taste receptors .
D. Foliate papillae : located on the sides at the back of the tongue , provide the sensations of taste and have taste buds embedded in their surfaces .
There are specific areas of the tongue receive each taste sensation , as follows :
● Sweet at the tip
● Salty at the anterior sides and tip
● Sour at the sides toward the posterior
● Bitter in the center of the dorsum toward the posterior .
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