Anatomy Lecture 31

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9spr
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70518
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Anatomy Lecture 31
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2011-03-03 17:56:57
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EMBRYOLOGY: PRE and POSTNATAL DEVELOPMENT
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  1. Embryology
    • is the study of developmental events during the prenatal period
    • Prenatal Period: conception to delivery
    • pre-embryonic development (period): fertilization, cleavage, implantation (weeks one and two), conceptus is called pre-embryo
    • embryonic development (period): third week to eighth week after fertilization, conceptus called embryo, organogenesis
    • fetal development (period): ninth week to delivery, maturation of the organ systems, conceptus is called a fetus
  2. lecture notes
  3. Pre-embryonic Development
    • Fertilization:
    • Cleavage:
    • Implantation:
  4. Fertilization:
    • sperm fusing with an egg
    • capacitation
    • fusion of sperm with egg
    • egg penetration
    • formation of male and female pronuclei
    • zygote formation
  5. lecture notes
  6. Cleavage:
    • period of cell division of the zygote
    • blastomere
    • pre-embryo (two identical blastomeres)
    • morula
    • blastocyst
    • blastocoele: trophoblast cells, inner cell mass
  7. lecture notes
  8. Implantation:
    • trophoblast adheres to and embeds into the endometrium
    • cellular trophoblast
    • syncytiotrophoblast
  9. lecture notes
  10. Embryonic Development
    Amniotic cavity

    Formation of Embryonic Disc (Blastodisc)
  11. Gastrulation:
    • germ layers:
    • ectoderm
    • endoderm
    • mesoderm
  12. lecture notes
  13. Extra-embryonic membranes:
    • yolk sac
    • amnion
    • allantois
    • chorion
  14. lecture notes
  15. Placentation and Organogenesis:
    • Placentation:
    • placenta
    • umbilical cord

    Organogenesis:
  16. lecture notes
  17. Fetal Development
    • development and maturation of organs and systems
    • cell differentiation
    • rapid cell growth
  18. lecture notes
  19. Labor and Delivery
    Stages of Labor: dilation, expulsion, placental

    Premature Labor:
  20. lecture notes
  21. Neonatal Period
    • birth to one month old
    • transition from fetus to neonate
    • physical status: heart rate, respiration, color, muscle tone, reflexes
  22. lecture notes

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