Urmetazoan

Common card · No. 452084

The Urmetazoan is the hypothetical last common ancestor of all animals. The name derives from metazoa, an old biological term for animals. It is universally accepted to have been a multicellular heterotroph — with the novelties of a germline and oogamy, an extracellular matrix (ECM) and basement membrane, cell-cell and cell-ECM adhesions and signaling pathways, collagen IV and fibrillar collagen, different cell types (as well as expanded gene and protein families), spatial regulation and a complex developmental plan, and relegated unicellular stages.

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