Biology 6 Practical Exam

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Presentation transcript:

Biology 6 Practical Exam Embryology Pics Biology 6 Practical Exam

Sea Urchin Cleavage Zygote  2 celled  4 celled  8 celled http://www.vcbio.science.ru.nl/en/virtuallessons/embryology/seaurchinstage/

Sea Urchin Morula blastomeres http://www.vcbio.science.ru.nl/en/virtuallessons/embryology/seaurchinstage/

Sea Urchin Blastula

Sea Urchin Gastrula

Frog – Early Blastula

Frog Blastula (future)

Frog Blastula A = anterior P = posterior area of mitosis blastocoel cortical layer area of invagination (opposite area of sperm entrance A = anterior P = posterior http://discoverdevelopment.com/php/slidesfrogearlydev.php

Frog – Early Gastrula ectoderm Dorsal yolk plug Archenteron Ventral endoderm ectoderm

Frog – Late Gastrula Ectoderm Endoderm Mesoderm Blastocoel Archenteron Dorsal lip of blastopore Blastopore Ventral lip of blastopore Yolk plug A = anterior P = posterior http://discoverdevelopment.com/php/slidesfrogearlydev.php

Frog Neurula

Frog Neurula Neural folds Neural crest cells Ectoderm Endoderm Ventral mesoderm/lateral plate mesoderm Notochord Dorsal mesoderm/paraxial mesoderm Archenteron

Starfish Development 4 celled 8 celled Blastula Early gastrula Late Gastrula

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