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Simplified schematic diagram (A) showing the structural components of the CAM, which amplifies the embedded microscopic view of the haematoxylin-eosin-stained slice of the CAM (B) where the ectoderm includes the chorion epithelium and sub-chorionic capillary sinus layers of the CAM, and the endoderm corresponds to the allantoic epithelium of the CAM. *Larger vessels in the mesoderm (stroma).
