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EMBRYOLOGY

EMBRYOLOGY. Bryein = to swell. Em =In. Embryo = The organism within the swelling. Embryology = the study of embryo. Human embryology = The study of human embryo and fetus. Embryo = The end of 1st week to the end of 8th week = Early development to the end of 8th week.

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EMBRYOLOGY

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  1. EMBRYOLOGY Bryein = to swell Em =In Embryo = The organism within the swelling Embryology = the study of embryo Human embryology = The study of human embryo and fetus Embryo = The end of 1st week to the end of 8th week = Early development to the end of 8th week Fetus = 9th week till birth Conceptus = Embryo + extraembryonic structures Developing anatomy = The descriptive science of human embryo

  2. Development = Growth and differentiation to increase the complexity Growth = the increment in size and mass of the organism Mechanism of growth Auxetic growth = Increase in size of the cell (Hypertrophy) Multiplication = Increase in number of the cell (Hyperplasia) Cell fusion Extracellular matrix secretion Differential growth Developmental biology

  3. DEVELOPING PROCESS 1. Cleavage 2. Pattern formation 3. Morphogenesis 4. Cell differentiation 5. Cell migration 6. Cell adhesion 7. Cell growth 8. Cell death

  4. DEVELOPING PERIOD Preembryonic -fertilized oocyte to the end of 1st week Prenatal Embryonic - the end of 1st week to the end of 8th week Fetal - 9th week till birth BIRTH New born - birth to the end of 2nd week Infancy - 3rd week to the end of 1st year Childhood -Early - milk tooth -2nd year to the end of 6th year - Middle -permanent tooth - 7th year to 9-10th year Postnatal - Later - prepubertal -12-15th year in female, 13-16th year in male PUBERTY Adolescence - 6 years after puberty Adult - 20th -60th year Senescence - 60(70) up DEATH

  5. PRENATAL DEVELOPMENT POSTNATAL DEVELOPMENT

  6. SCOPE OF EMBRYOLOGY DESCRIPTIVE EMBRYOLOGY What, where, when COMPARATIVE EMBRYOLOGY Why EXPERIMENTAL EMBRYOLOGY How TERATOLOGY Malformation,abnormal

  7. Gamete (SEX CELL,GONOCYTE, GERM CELL) Male gamete = Sperm, Spermatozoa Female gamete = Oocyte

  8. GAMETOGENESIS SPERMATOGENESIS Spermatogonial phase (mitosis) Spermatocyte phase (meiosis) Spermatid phase (metamorphosis) OOGENESIS

  9. SPERMATOZOA

  10. CUMULUS - OOCYTE COMPLEX

  11. EARLYDEVELOPMENT

  12. Stigma Inflamed stigma Ovulation Ovarian fimbria

  13. FERTILIZATION

  14. ACROSOME REACTION

  15. SPERM - OOCYTE FUSION

  16. CORTICAL REACTION ZONA REACTION

  17. EARLYDEVELOPMENT

  18. PARTHENOGENESIS GYNOGENONE ANDROGENONE GENOMIC IMPRINTING

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