Zebrafish - Pharyngula Period: Difference between revisions
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[http://php.med.unsw.edu.au/embryology/index.php?title=Zygote_Period Zygote Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Cleavage_Period Cleavage Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Blastula_Period Blastula Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Gastrula_Period Gastrula Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Segmentation_Period Segmentation Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Hatching_Period Hatching Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Larvae_Period Larvae Period]] / [http://php.med.unsw.edu.au/embryology/index.php?title=2009_Group_Project_3#Timeline_and_Stages_of_Embryonic_Development Home Page ] | |||
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Revision as of 04:37, 24 September 2009
Pharyngula Period
The duration of this period is from 24 to 48 hours
- Transition from Prim 5 to Long-pec
- The body axis begins to straighten and the head straightens out and lifts dorsally
- Notochord is well developed
- Formation of the Dorsal and Ventral Stripe
- Nervous system is hollow and expanding anteriorly
- The brain has developed into 5 distinct lobes
- Seven pharyngeal arch's develop rapidly during this stage
- Pectoral fins begin to develop
- The Circulatory system develops and the heart beats for the first time
- Blood begins to circulate through a closed circuit of channels
- Tactile sensitivity appears and uncoordinated movements occur
Video of a Zebrafish embryo heart beating
Zygote Period / Cleavage Period / Blastula Period / Gastrula Period / Segmentation Period / Hatching Period / Larvae Period] / Home Page
