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D2: Ovoid stomach with developing space of the lesser sac on R. Dorsal and ventral attachments of the mesenchyme are now known as dorsal and ventral mesogastria. Coelomic canals.
DEVELOPMENT OF THE NERVOUS SYSTEM
D2: Spinal cord has enlarged ventral horns (motor neurons).
DEVELOPMENT OF THE MUSCULOSKELETAL SYSTEM
Dl-D3: Dermatome, myotome, sclerotome. Dorsal root ganglia. Notochord. Note the dorsal segmental branches of the dorsal aortae and the inferior cardinal veins. In the walls of the neural tube, note the alar and basal laminae of cells, sulcus limitans.
