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33 Cards in this Set
- Front
- Back
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FIRST WEEK OF HUMAN DEVELOPMENT
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FERTILIZATION
CLEAVAGE BLASTOCYST FORMATION IMPLANTATION |
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AMPULLA
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OPENING AT END OF FALLOPIAN TUBE. USUAL SITE OF FERTILIZATION.
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CORONA RADIATA (FOLLICLE CELLS)
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FOLLICLE CELLS SURROUNDING THE UNFERTILIZED EGG. 2-3 LAYERS. MUST BE PENETRATED BY SPERM
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ZONA PELLUCIDA (GLYCOPROTEIN SHELL)
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SHELL AROUND OVUM MEMBRANE. BINDS TO SPERM. THE BLASTOCYST WILL HATCH FROM THE ZONA PELLUCIDA AROUND DAY 5.
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BLASTOMERE
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TOTIPOTENT (UP TO 8 CELLS) CELL OF THE FERTILIZED ZYGOTE.
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MORULA
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16-32 CELL ZYGOTE. NO LONGER TOTIPOTENT.
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BLASTOCYST
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COMPACTION AND CAVITATION OF MORULA RESULTS INT HE BLASTOCYST
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TROPHOBLAST
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BLASTOCYST CELLS THAT WILL BECOME THE PLACENTA
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EMBRYOBLAST
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BLASTOCYST CELLS THAT WILL BECOME THE EMBRYO. THE INNER MASS. PLURIPOTENT.
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CORPUS LUTEUM
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OVARIAN STRUCTURE. DEVELOPS FROM CELLS OF RUPTURED FOLLICLE. SECRETES PROGESTERONE UNTIL THE PLACENTA TAKES OVER.
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IMPLANTATION IN UTERINE WALL
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DAY 6-7
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RULE OF 2S
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2X2 LAYERS AND 2 CAVITIES.
TROPHOBLAST, EMBRYOBLAST |
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TROPHOBLAST DIFFERENTIATION
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INNER CYTOTROPHOBLAST
OUTER SYNCYTIOTROPHOBLAST |
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EMBRYOBLAST DIFFERENTIATION
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HYPOBLAST AND EPIBLAST
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HYPOBLAST
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CUBOIDAL CELLS IN THE BLASTOCYST CAVITY. WILL GO ON TO LINE THE BLASTOCYST CAVITY AND FROM THE PRIMITIVE YOLK SAC
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EPIBLAST
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COLUMNAR CELLS THAT SECRETE FLUID TO FORM THE AMNIOTIC CAVITY
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2 CAVITIES
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AMNIOTIC AND EXOCOELOMIC CAVITY (YOLK SAC).
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HYDATIDIFORM MOLE
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PREGNANCY WITHOUT AND EMBRYO
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GASTRULATION
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ESTABLISHES 3 GERM LAYERS.
BODY AXIS DEFINED. FORMATION OF PRIMITIVE STREAK, GROVE AND NODE. |
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PROCESS OF GASTRULATION
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EPIBLASTS CELLS INVAGINATE THE PRIMITIVE STREAK AND BISPLACE THE HYPOBLASTS FORMING ENDOBLASTS. ENDOBLASTS BECOME THE MESODERM
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EMT
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EPITHELIAL TO MESENCHYMAL TRANSITION
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DERIVATIVES OF ECTODERM GERM LAYER
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CNS, PNS, EPIDERMIS, HAIR AND NAILS, SENSORY EPITHELIUM OF NOSE, EYE, EAR.
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DERIVATIVES OF ENDODERM GERM LAYER
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EPITHELIUM OF GUT AND ITS DERIVATIVES
EPITHELIUM OF RESPIRATORY SYSTEM |
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DIFFERENTIATION OF MESODERMAL GERM LAYER
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PARAXIAL MESODERM
INTERMEDIATE MESODERM LATERAL PLATE MESODERM |
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PRAXIAL MESODERM
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GIVES RISE TO VERTEBRAL COLUMN, MUSCLE, SKI
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INTERMEDIATE MESODERM
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UROGENITAL SYSTEM
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LATERAL PLATE MESODERM
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BODY WALL (SOMATIC MESODERM), WALL OF GUT (SPLANCHNIC MESODERM) AND LIMBS
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MECHANISMS OF EMBRYONIC INDUCTION
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DIFFUSION OF INDUCER MOLECULES
CONTACT OF ECM BETWEEN CELLS DIRECT CONTACT BETWEEN CELLS (GAP JUNCTIONS) |
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BIG PICTURE EMBRYONIC MALFORMATIONS
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3-8 WEEKS. PRIOR TO 3 WEEKS USUALLY RESULTS IN SPONTANEOUS ABORTION. AFTER 8 WEEKS FETUS IS LARGELY FORMED.
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END OF WEEK 1
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BLASTOCYST IMPLANTS ON UTERINE WALL
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END OF WEEK 2
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TRILAMINAR EMBRYO (3 GERM LAYERS)
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END OF WEEK THREE
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EMBRYO WITH NEURAL GROOVE, SOMITES AND PRIMITIVE STREAK
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END OF WEEK 4
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LITTLE FISH BABY WITH TAIL.
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