PPT-AMELOGENESIS According to their function, the life span of the cells of the inner enamel

1 Morphogenic 2 Organizing 3 Formative 4 M aturative 5 Protective and 6 Desmolytic Life cycle of the ameloblasts Since the differentiation of . Morphological and biological characteristics of the tooth germ. Teeth have a dual origin:. Ectodermal. ;. Mesodermal. :. Ectomesenchymal. .. Origin of teeth. EPITHELIUM-ECTOMESEMCHYME INTERACTION IN THE TOOTH DEVELOPMENT. . TISSUE. G. roups of cells which are similar in structure and which perform common or related functions.. There are (4) types of tissue:. 1. Epithelial . 2. Connective. 3. Muscle . 4. Nervous . TERMS TO KNOW. Functions of the alimentary mucosa:. 1. . Barrier function: . The mucosa serves as a barrier to the entry of noxious substances, antigens, and pathogenic organisms.. 2. . . Immunologic function. : . Lymphatic tissue in the mucosa serves as a first line of defense of the body by the immune system.. Khaleel Alyahya. Monday March 22, 2009. Tissue. There . are only 4 basic types of . tissues. . 1.   Epithelial tissue . 2.   Connective tissue . 3.   Muscular tissue . 4.   Nervous tissue. Epithelium. 4-. 2. Tissue Level of Organization. The classification of tissue types is based on the structure of cells; the composition of noncellular substance surrounding cells (extracellular matrix) and the functions of the cells.. VIBS 289 lab. . . Larry Johnson Texas A&M University. Epithelium - function. Epithelium. forms the . outer protective surface . of the body and . all the glands. 4-. 2. Tissue Level of Organization. The classification of tissue types is based on the structure of cells; the composition of noncellular substance surrounding cells (extracellular matrix) and the functions of the cells.. VIBS 289 lab. . . Larry Johnson Texas A&M University. Epithelium - function. Epithelium. forms the . outer protective surface . of the body and . all the glands. Tooth development or . odontogenesis. is the complex process by which teeth form from embryonic cells, grow, and erupt into the mouth. Although many diverse species have teeth, non-human tooth development is largely the same as in humans. For human teeth to have a healthy oral environment, enamel, dentin, . :. The primitive oral cavity, or . stomodeum. , is lined by stratified squamous epithelium called the . oral ectoderm or primitive oral epithelium. . The oral ectoderm contacts the endoderm of the foregut to form the . :. According to their function, the life span of the cells of the inner enamel epithelium can be divided into six stages: (1) . morphogenic. , (2) organizing, (3) formative, (4) . maturative. , (5) protective, and (6) . Epithelium Lecture Objectives. Describe the structural and functional relationship between:. epithelium and connective tissue, and. epithelium and basal lamina.. Describe the structural and functional features of epithelial intercellular junctions and specializations of the apical surface of epithelial cells.. On the cusps of human molars and premolars the enamel attains a maximum . thickness of about 2 to 2.5mm, . thinning down to almost a knife edge at the neck of the tooth.. It is the . hardest calcified tissue. teeth.. Arranged . in two bilaterally symmetric arches in the . maxillary and . mandibular . bones. Each quadrant has . eight teeth.. Two . incisors, one canine, two premolars, and three permanent molars.