18 hour chick embryo

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Page 1: 18 Hour Chick Embryo
Page 2: 18 Hour Chick Embryo

proamnion

Head fold

somites

Primitive pitHensen’s node

Area pelucidaArea opaca

Primitive foldsPrimitive ridge

Primitive plate

Page 3: 18 Hour Chick Embryo

Blood islands

Page 4: 18 Hour Chick Embryo

mesoderm

ectoderm

Level of head process

Page 5: 18 Hour Chick Embryo

Primitive groove

Primitive fold

Area opaca

Area pellucida

Page 6: 18 Hour Chick Embryo

Hensen’s node

Primitive pit

mesodermArea opaca

endoderm

ectoderm

Page 7: 18 Hour Chick Embryo