PPT-DENTITION IN MAMMALS B.Sc. (H), SEM II: ZOOL-H-DC4-T

Dr Dip Mukherjee Assistant Professor of Zoology SBS Government College Hili Delivered on 04012020 Introduction D entition is the arrangement of teeth in the upper and lower jaws mainly on the premaxilla maxilla and dentary bones. Diphyodont. and . Heterodont. . humans. . homodont. : . all. . tooth. . are. . alike. ;. . heterodont. : . teeth. . have. . diferent. . shapes. ;. . poliphyodont. : . changing. of . teeth. OUT LINE. NORMAL DENTAL DEVELOPMENT. ABNORMALITIES OF ERUPTION AND EXFOLIATION. MIXED DENTITION PROBLEMS. PLANNED EXTRACTION OF DECIDUOUS TEETH. WHAT TO REFER AND WHEN. 1. NORMAL . DENTAL . DEVELOPMENT. MANDIBULAR. Tooth Numbering Systems. Universal Tooth Numbering System. Dentition. Primary dentition. Deciduous dentition—20 teeth. Mixed dentition. Combination of primary and permanent dentition. _____________Mun. Ent. Zool. Vol. 5, No. 1, January 2010__________ Franz, J. M. 1971. Biological and integrated control of pest organisms in forestry. Part II. Unasylva, 25: Gauld, I. D. 1988. Evoluti MANDIBULAR. Tooth Numbering Systems. Universal Tooth Numbering System. Dentition. Primary dentition. Deciduous dentition—20 teeth. Mixed dentition. Combination of primary and permanent dentition. Dr. . Jagdish. . Kaur. P.G.G.C,Sector. 11, Chandigarh. Arrangement of teeth in jaws in vertebrates . In . cyclostomates. , . teeths. are arranged on tongue and in . buccal. funnel . In rest of vertebrates teeth are mostly arranged on jaws. – Deciduous teeth. There are . 20 primary teeth . (10 at every jaw):. 8 incisors, 4 canines and 8 primary molars. . By 4 months in . utero. : Teeth begin to form in bone. By Age 2. : All deciduous . SYSTEM. Types of numbering system’s. . There are several systems in world, . 3 main systems are :. Universal Notation System.. Zsigmondy/Palmer Notation System.. Federation Dentaire Internationale (FDI).. Chapter 16. Birds. Birds belong to the class Aves.. Aves comes from the Latin word for bird. .. First appeared on Earth 150 million years . ago. Section 1. Bird Characteristics. S. hare some characteristics with reptiles. Introduction. I´m. . going. . to. . talk. . about. :. Mammals. .. What. . they. . eat. .. Their. . body. . covering. .. What. are . they. .. How. . they. reproduce. . AND. HUMAN BEINGS. Integument & Derivatives. Skin is thicker than other vertebrates. Epidermis – thinner, protected by hair. Dermis – thicker. Glands. Sweat Glands. Eccrine glands. Secrete a watery fluid, draws heat away when evaporated . Birds. Birds belong to the class Aves.. Aves comes from the Latin word for bird. .. First appeared on Earth 150 million years . ago. Section 1. Bird Characteristics. S. hare some characteristics with reptiles. RWS1301. Lang/Phil/Culture. PHIL 3206. Creative Arts. MUSL 1327. HIST 1301. HIST 1302. POLS 2310. POLS 2311. SCI 1301. COMM 1301. Soc & . Beh. Sci. PSYC 1301. MATH 1411. MATH 1312 or. STAT 2480. Characteristics of mammals. Characteristics of mammals. All mammals have the following in common:. 1. Are . endothermic . 2. Hair. 3. Specialized . teeth. 4. PARENTAL CARE- Females . produce milk in .