sikiökerrokset
Sikiökerrokset, often translated as embryonic germ layers, are fundamental structures formed during early embryonic development in metazoan animals. These layers arise from the inner cell mass of the blastocyst and represent the primary cell populations that will differentiate to form all the tissues and organs of the developing organism. The number of germ layers varies depending on the animal group.
In diploblastic organisms, such as cnidarians (jellyfish and corals) and ctenophores (comb jellies), only two germ
Triploblastic organisms, which encompass the vast majority of animal phyla including vertebrates, arthropods, and mollusks, develop