CHAPTER 12 Flashcards by EVELYN OPATRNY BURR

Q

what provides support to the ECM

A

collagen

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Q

defining animal charachterists

A

-sexual reproduction
-diploid life style

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Q

4 embryo stages

A

Fertilization
Cleavage
Gastrulation (in almost all animals)
Organogenesis (in almost all animals)

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Q

fertilization can be…

A

internal and external

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Q

totipotent

A

the ability to divide and form an entire organism

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Q

blastula

A

sphere of cells as a result of cleavage

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Q

blastocoel

A

central cavity of blastula

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Q

Archenteron

A

the inside of the Gastrulation thing

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Q

Endoderm

A

second layer of the Gastrulation thing

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Q

Blastocoel

A

third layer of the Gastrulation thing

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Q

Ectoderm

A

outer layer of the Gastrulation thing

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Q

Invagination

A

Sheet of cells bulges inward

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Q

Involution

A

Sheet of cells rolls over itself

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Q

Opening to archenteron is called…

A

blastopore

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Q

blastopore develops into what

A

mouth and or booty

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Q

coelom

A

internal cavity and structures

Q

Organogenesis

A

Development of individual organs

Q

Invagination creates what

A

blastopore

Q

notochord

A

induces folding of ectoderm cells above

Q

somites form what

A

vertebrae & muscles