Vascular System (Embryonic Development)
The early embryonic vascular system permits circulation through a series of incompletely fused and developing channels. Before the heart is fully formed, the fl...
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Epigenesis
Epigenesis is development from an embryo with the sequential appearance of tissues and organs. The tissues and organs differentiate from a population of equivalent (undifferentiated) embryo...
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Vascular System (Embryonic Development)
Epigenesis