QUIZ 3 Flashcards Preview

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Flashcards in QUIZ 3 Deck (11):
1

Cumulus cells

Cells surrounding and protecting the egg

2

Collective endeavor

Multiple sperm required to pierce through cumulus cells

3

Acrosome reaction

Sperm attaches to reinforced cover (zona pellucida)
Activated chemical drill to penetrate glycoproteins.

4

Cortical reaction

Zona pellucida becomes impenetrable to prevent polyspermy

5

Developmental steps (10)

Fertilization > zygote > 2 cell > 4 cell > 8 cell > 8 cell compacted morula > 16 cell morula > 32 cell morula > early blastocyst > late blastocyst

6

Day 0
Day 3
Day 4
Day 8
Implantation range

Day 0 Amullary region
Day 3 development in fallopian
Day 4 enter uterus
Day 8 late blastocyst
Implantation range 6-14 days

7

Implantation

8 days after conception

8

Embryonic Period

8th week
When organogenesis is initiated

9

Fetus

9-10 weeks
Organogenesis is complete including placenta

10

Epitheliochorial placenta

(Hippos and pigs)
Layer of fetal tissue merely pressed close against the uterus wall

11

Hemochorial

Maternal blood is in direct contact with the chorion