An embryo is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilizati
A human embryo seven weeks after conception (nine weeks gestational age)
Embryos (and one tadpole) of the wrinkled frog (Rana rugosa)
The inside of a Ginkgo seed, showing the embryo
Developmental biology is the scientific study of the processes by which animals and plants grow and develop. The field of developmental biology is further defined by its study of phenomena such as reg
The Notch-delta system in neurogenesis (Slack Essential Dev Biol Fig 14.12a)
Generalized scheme of embryonic development. Slack "Essential Developmental Biology". Fig. 2.8.