ORAL EMBRYOLOGY 2 Introduction: Oral embryology is the study of the developmental stages of the teeth and oral cavity from conception to before the birth of a fetus. The face and oral cavity all begin to devolp within the embryonic period of pregnancy. For the oral cavity to be fully functional it has to go through many different developmental stages. The development of the oral cavity begins within the third week of pregnancy when the Ectoderm and Mesoderm
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HANDOUT Click on pictures for an enlarged view of the graphic. Refer to Picture 1‚ 2 and 3 (from: James K Avery: Essentials of Oral Histology and Embryology - A Clinical Approach‚ Mosby Year Book) Picture 1 | Picture 2 | Picture 3 | The branchial (=Gr gill) apparatus comprises an early structure during embryologic development. It is associated with the formation of the head and neck. It consists of the branchial arches‚ the pharyngeal pouches‚ the branchial clefts or grooves and the
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Comparative Embryology According to embryology‚ all vertebrate embryos follow a common developmental path due to their common ancestry. All have a set of very similar genes that define their basic body plan. As they grow‚ the differences that will distinguish the embryos as adults become more and more apparent. The study of this development can yield insights into the process of evolution. This branch of embryology that compares
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EMBRYOLOGY WHAT IS EMBRYOLOGY? The study of embryo and fetus is called embryology. WHAT IS THE SIGNIFICANCE OF EMBRYOLOGY? It tells us how life begins and what are events of development in the intrauterine life. INTIAL STAGES OF EMBRYOLOGY BEFORE DEVELOPMENT Gonades Ovary in female Testis in Male Oogenensis Spermatogenesis Ovum (Haploid)
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Frog Embryology The Egg The frog egg is a huge cell; its volume is over 1.6 million times larger than a normal frog cell. During embryonic development‚ the egg will be converted into a tadpole containing millions of cells but containing the same amount of organic matter. * The upper hemisphere of the egg — the animal pole — is dark. * The lower hemisphere — the vegetal pole — is light. * When deposited in the water and ready for fertilization‚ the haploid egg is at metaphase of meiosis
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EMBRYOLOGY QUESTIONS 1. What is the condition where the umbilical cord attaches very closely to the margin of the placenta? A: Battledore Placenta 2. What is the precise source of blood in the intervillous space for the developing fetus? A: The Maternal Spiral Endometrial Arteries 3. What is a function al importance of fibrin deposits in the placenta besides its sealing effect? A: They play a materno-fetal immunological/immune role 4. Finish this sentence: Decidua basalis
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Embryology Week 1 Ovarian cycle: GnRH from hypothalamus FSH and LH from pituitary cyclic changes in the ovary. Follicular phase: * 15-20 preantral follicles start to grow due to FSH * 1 reaches full maturity released * Others undrgo atresia * Estrogens are released which; 1. Proliferate endometrium 2. Thin the cervical mucus 3. Stimulate pituitary to release LH * The LH; 1. Elevate concentrations of maturation promoting factor (oocytes complete
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The Human Dentition Dentition is a term that describes all of the upper and lower teeth in the dental arch. Dentition pertains to the development of teeth and their arrangement in the mouth. It is the characteristic arrangement‚ kind‚ and number of teeth. There are three dentition periods. They are primary dentition‚ mix dentition‚ and permanent dentition. First stage is primary dentition which is consists of 20 teeth in all. Mix dentition is the second stage of both primary and permanent teeth
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the benchmark on Oral Care solutions in India. Unilever is a leading manufacturer of oral care products in over 50 countries around the world. Around four billion people; that means approximately 70% of the world’s population‚ have access to Unilever Oral Care products. Pepsodent was launched in 1993 in India and since then the brand has raised the benchmark on Oral Care solutions in India. Pepsodent has a range of toothpastes and toothbrushes that could take care of specific oral care needs. Pepsodent
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describe the nurses role in relation to promoting clients oral health. This essay begins by firstly describing what oral health is‚ going on to then answer what is good oral health care. It then goes on to discuss when and how oral hygiene is promoted and what the consequences are of bad mouth care. What is oral health? This is a frequently asked question with many different answers. Brooker and Waugh state that “ oral care is a basic hygiene need in both healthy and sick
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