Human embryo about fifteen days old.
Front view of two successive stages in the development of the digestive tube.
Tail end of human embryo from fifteen to eighteen days old.
Cloaca of human embryo from twenty-five to twenty-seven days old.
Tail end of human embryo twenty-five to twenty-nine days old.
Primitive kidney and bladder, from a reconstruction.
Stages in the development of the external sexual organs in the male and female.
Read more about this topic: Cloaca (embryology)
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