NORMAL ANATOMY AND HISTOLOGYOF THE ORAL MUCOSA [2]
论文作者:佚名论文属性:短文 essay登出时间:2009-12-03编辑:lisa点击率:14043
论文字数:500论文编号:org200912031722361050语种:英语 English地区:中国价格:免费论文
关键词:
steriorly, the buccal mucosa blends into the tonsillar area.
Tongue
The tongue is a highly specialized organ with numerous functions: taste, speech, mastication, and sensation, to list the more important ones. The lingual mucous membrane covers a highly complex muscular system and must be adapted to continuous irritational stimuli of varying nature. The mucosa covering the dorsal surface of the tongue is rough in texture and is composed of large numbers of minute papillae. The major group of lingual papillae is the filiform papillae, which are small and punctate in appearance, giving the tongue a filelike texture. Scattered among these are the large fungiform, which appear somewhat redder in color. At the posterior border the lingual dorsum is the large circumvallate papillae arranged in a V-shaped configuration, with the point facing the orophargnx. There are approximately 8 to 10 circumvallate papillae arranged in two diagonal rows. In the posterior portion of the lateral border of the tongue are the foliate papillae red, irregularly shaped soft masses of lymphoid tissue. The mucosa of the ventral surface of the tongue is smooth and delicate, with no papillary structures. The mucosa of the ventral surface of the tongue blends into the mucosa of the floor of the mouth; a lingual frenum runs from the ventral surface of the tongue to the floor of the mouth.
Floor of Mouth
The mucosa here covers the sublingual glands and the mylohyoid and geniohyoid muscles.
The floor of the mouth is the relatively small area anterior to the lingual attachment. It extends posteriorly on either side of the tongue to form a narrow vestibule between the tongue and mandibular teeth. Anteriorly, the mucosa of the floor of the mouth blends into the lingual portion of the mandibular gingiva. Anterior to the attachment of the lingual frenum are two diagonal ridges meeting in the midline to form a V configuration pointing anteriorly. Along these rideges or sublingual caruncula open the numerous ducts of the sublingual glands.
Hard Palate
The mucosa of the hard palate covers the palatal osseous structure and is firmly attached to the underlying connective tissue, although some displacement, of this mucosal tissue is possible. Numerous mucous glands lie beneath the palatal mucosa, and their ducts appear on the palatal surface as large numbers of small pores. Anteriorly, the hard palate presents numerous folds of firm tissue.
Soft Palate
The soft palate is that palatal mucosa posterior to the osseous structure of the palate. The soft palate is more freely movable than the hard pa1ate, and the demarcation between hard and having a person open .his mouth wide and expose his throat easily sees soft palate. In this action the soft palate folds upward. The soft palate blends into the uvula posteriorly in the midline.
Tonsillar Area ( Fauces )
The bilateral palatine tonsils lie in spaces inferior to and continueous with the soft palate. The pharyngopalatine arch bound these spaces anteriorly by the glossopalatine arch and posteriorly. The tonsillar spaces and the area between them are also referred to as the fauces. The glossopalatine and pharyngopalatine arches are usually referred to as the anterior and posterior pillars of the fauc
本论文由英语论文网提供整理,提供论文代写,英语论文代写,代写论文,代写英语论文,代写留学生论文,代写英文论文,留学生论文代写相关核心关键词搜索。