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. Monotremes. Luo. et al. (2002).. Node labeled 1 indicates our (stable) . clade. -based definition of . Mammalia. .. This is the commonly used crown-. clade. definition.. Luo. et al. (2002).. We’ll look first at the . Diphyodont. and . Heterodont. . humans. . homodont. : . all. . tooth. . are. . alike. ;. . heterodont. : . teeth. . have. . diferent. . shapes. ;. . poliphyodont. : . changing. of . teeth. MANDIBULAR. Tooth Numbering Systems. Universal Tooth Numbering System. Dentition. Primary dentition. Deciduous dentition—20 teeth. Mixed dentition. Combination of primary and permanent dentition. Basic characteristics . Warm . blooded. Have a backbone. Have hair or fur on their bodies. Breathe in oxygen and breathe out carbon . dioxide. Have live babies- do not lay eggs!. Feed babies with milk from their . 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 . 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. Infrastructure Consolidation . of Accelerators Injectors. . (civil engineering). Cristiana Colloca GS/SEM – ATOP 5th of March 2009. CONCERNED. Surface. - Roofs, façades, floors, windows, sanitary etc. all buildings (machine and tertiary). Geofencing. and SEO Overview . . Search Engine Optimization (SEO). . Confidential. November 2016. Taking Control of Brand. The #1 method for how people discover a company’s digital presence is through organic search. Introduction. I´m. . going. . to. . talk. . about. :. Mammals. .. What. . they. . eat. .. Their. . body. . covering. .. What. are . they. .. How. . they. reproduce. . AND. HUMAN BEINGS. 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 . Ancestors that dominated the Permian And Early Triassic. “Triassic Takeover”. . - Dominance of dinosaurs may have driven some . therapsids. to a nocturnal, insectivorous lifestyle.. . - this may have selected for hair and .