24 hour chick embryo
TRANSCRIPT
somites
Undifferentiated somites
Neural fold
Anterior neuropore
Hensen’s node
Primitive streak
proamnion
foregutAnterior intestinal portal
Sphlancnic mesoderm
Anterior neuropore
pharynx
Oral plate
Subcephalic pocket
Subcephalic pocket
ectoderm
mesoderm
endoderm
Head fold
Anterior intestinal portal
Pharyngeal pouches
Almost neural tube
notochord
Head mesenchyme
Amnio-cardiac vesicle
Sphlanchnopleure (?)
Neural groove
somites
Intermediate mesoderm
coelom
Lateral plate mesoderm
midgut
Cardiac primordia
Somatic and sphlancnic mesoderm
Primtive pit
Area opaca vasculosa
Mesenchymal cells
Yolk and blood islands
Yolk and blood islands in region of area opaca
Cardiac primordia
Cardiac primordia
Subcephalic pocket <?>
Somatic mesoderm
Sphlancnic mesoderm
mesoderm
Blood island and yolk