fuck eat Flashcards by Raize Sobretodo

Q

18hr Chick Prominent Structures

A

Neural groove, primitive streak

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Q

18hr Chick New Structures

A

Neural folds

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Q

18hr Chick Adjacent Structures

A

Presumptive notochord, mesodermal cells

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Q

18hr Chick Number of Somites

A

3 pairs

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Q

18hr Chick Size

A

~2 mm

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Q

18hr Chick Germ Layers

A

Ectoderm (neural folds), mesoderm, endoderm

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Q

18hr Chick Primary Vesicles

A

Neural plate forming

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Q

18hr Chick Adult Derivatives of Primary Vesicles

A

Forebrain (prosencephalon), midbrain (mesencephalon), hindbrain (rhombencephalon) emerge

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Q

24hr Chick Prominent Structures

A

Neural groove, primitive streak

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Q

24hr Chick New Structures

A

Forebrain, heart tube

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Q

24hr Chick Lost/Regressed Structures

A

Primitive streak regressing

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Q

24hr Chick Adjacent Structures

A

Heart adjacent to foregut

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Q

24hr Chick Number of Somites

A

~4-5 pairs

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Q

24hr Chick Size

A

~3 mm

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Q

24hr Chick Flexure

A

Cranial flexure beginning

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Q

24hr Chick Primary Vesicles

A

Prosencephalon, mesencephalon, rhombencephalon

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Q

24hr Chick Adult Derivatives of Primary Vesicles

A

Prosencephalon → Telencephalon, diencephalon; mesencephalon unchanged; rhombencephalon → metencephalon, myelencephalon

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Q

33hr Chick Prominent Structures

A

Closed neural tube, optic vesicles

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Q

33hr Chick New Structures

A

First pharyngeal arch, cardiac looping

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Q

33hr Chick Lost/Regressed Structures

A

Primitive streak nearly absent

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Q

33hr Chick Adjacent Structures

A

Head prominent over yolk sac

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Q

33hr Chick Number of Somites

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A

~12-13

Q

33hr Chick Size

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A

~4 mm

Q

33hr Chick Flexure

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A

Pronounced cranial flexure

33hr Chick Chick Turning

Turning begins (right)??

33hr Chick Germ Layers

Ectoderm (neural ectoderm forming brain and neural crest), mesoderm, endoderm

33hr Chick Adult Derivatives of Primary Vesicles

Same as 24hr stage, but optic vesicle development and brain regionalization more distinct

42hr Chick Prominent Structures

Heart looping, lens placodes

42hr Chick New Structures

Limb bud formation, otic vesicles

42hr Chick Lost/Regressed Structures

Neural groove fused

42hr Chick Adjacent Structures

Developing forelimb buds

42hr Chick Number of Somites

~26

42hr Chick Size

~7mm

42hr Chick Flexure

Cranial and cervical flexure

42hr Chick Chick Turning

Right-side turning??

42hr Chick Germ Layers

Ectoderm forms sensory structures; mesoderm drives body segmentation

48hr Chick

Development of optic vesicles (retina, optic nerves), otic vesicles (inner ear), and pharyngeal derivatives

55hr Chick Prominent Structures

Limb buds, spinal ganglia

55hr Chick New Structures

Pharyngeal arches, liver primordium

55hr Chick Lost/Regressed Structures

Regressed yolk sac in central area

55hr Chick Adjacent Structures

Somites extend along length

55hr Chick Number of Somites

~26-28

55hr Chick Size

?

55hr Chick Flexure

subcephalic flexure

55hr Chick Chick Turning

left-side down on the yolk

55hr Chick Adult Derivatives of Primary Vesicles

Formation of hindbrain structures (pons, medulla), telencephalon expansion visible

72hr Chick Prominent Structures

Limb buds, prominent brain regions

72hr Chick New Structures

Allantois, further heart chambers

72hr Chick Lost/Regressed Structures

Reduced cranial flexure

72hr Chick Adjacent Structures

Tail fold forming

v72hr Chick Number of Somites

36 pairs

72hr Chick size

6mm

72hr Chick Flexure

Cranial flexure reduces; tail flexure begins