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Anatomy > Theme 7 > Flashcards

Theme 7 Flashcards

1
Q

What are the 3 periods of development before birth?

A 
Pre-embryonic development (conception to 2 weeks)
Embryonic period (2-8 weeks)
Foetal period (9 weeks to birth)
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2
Q

What occurs during the pre-embryonic period?

A 
Fertilisation
Cleavage
Blastocyst formation
Implantation
Bilaminar embryo
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3
Q

What is fertilisation?

A

Spermatozoon penetrates corona radiata and zona pellucida
Oocyte nad sperm membrane fuse
Causes 2nd mitotic division and activation of egg by influx of Ca2+
Formation of diploid chromosome

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4
Q

What is cleavage?

A

Repeated mitotic division of zygotes into blastomeres that pack into a morula

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Anatomy (40 decks)

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