Transcript Embryology Pics

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)
(future)
Frog Blastula
http://discoverdevelopment.com/php/slidesfrogearlydev.php
1.
2.
3.
4.
5.
area of mitosis
A = anterior
blastocoel
P = posterior
cortical layer
cortical layer
area of invagination (opposite area of sperm entrance
Frog – Early Gastrula
ectoderm
Dorsal
yolk plug
Archenteron
endoderm
Ventral
Frog – Late Gastrula
1.
2.
3.
4.
5.
6.
7.
8.
9.
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
1.
2.
3.
4.
5.
6.
7.
8.
Neural folds
Neural crest cells
Ectoderm
Endoderm
Ventral mesoderm/lateral plate mesoderm
Notochord
Dorsal mesoderm/paraxial mesoderm
Archenteron
Starfish Development
4 celled
Early gastrula
8 celled
Late Gastrula
Blastula