Development

  1. time between conception and birth
    prenatal period
  2. conception to the first 8 weeks
    embryonic period
  3. 8 weeks to birth
    fetal period
  4. At the start of the embryonic period (week 1), __
    • fertilization occurs in the lateral 3rd of fallopian tube
    • A zygote does cell division &¬†becomes a morula with¬†12-16 cells to the uterus.
    • Blastocyst forms.

    (page 5 & 6 on slide)
  5. The __ of the __ becomes the placenta & the __ becomes the fetus.
    trophoblast (provide nutrients); blastocyst; inner cell mass

    (page 7 & 8 on slide)
  6. During implantation (week 2), the __ differentiates into __
    • inner cell mass;
    • the epiblast (turn into fetus & amniotic sac) & hypoblast (turn into yolk sac)

    (page 10 on slide)
  7. Week 3, __ occurs with the formation of a __ & __
    • gastrulation;
    • primitive streak
    • 3 primary germ layers (ectoderm, mesoderm, endoderm);

    (Migration of cells from the epiblast through the primitive streak or node forms the 3 layers.)
  8. The primitive streak forms __
    caudally

    (page 12 on slide)
  9. A __ forms in the mesoderm & __ occurs, first the __ is formed. Then a __ to form a __.
    • notochord;
    • neuralation;
    • neural plate;
    • neural groove;
    • neural tube (above notochord)

    (page 15 & 18 on slide)
  10. Week 4, after the neural tube is formed, __
    the blastocyst is now an embryo takes a cylindrical shape & the adult body plan starts to form

    (page 20 & 24 on slide)
  11. The ectoderm becomes the __
    • brain
    • spinal cord
    • skin
  12. The mesoderm becomes __
    • muscles
    • connective tissue
    • heart
    • kidneys
  13. The endoderm becomes the __
    • lining of respiratory system
    • lining of digestive tract
Author
sophathida
ID
325956
Card Set
Development
Description
Week 9
Updated