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No, triploblastic.
Triploblastic have three germinal layers and Diploblastic have two germinal layers
diploblastic have two body wall ectoderm and endoderm
triploblastic : organisms which have three layers in the embryo : the ectoderm,mesoderm & endoderm
angazi
They are triploblastic because they are apart of the phyla Echinodermata. If you look at the animal phylogenetic tree you can see that starfish are apart of the triploblasts. The difference between diploblastic and triploblastic is that diploblastic have two germ layers during development which are the ectoderm and endoderm. Triploblastic animals (like starfish, and humans) have three germ layers which are the ectoderm (outside), mesoderm (middle) and endoderm (inside).
Gastrulation
Cnidaria are Diploblastic, having two main body layers. They also have a Mesoderm, but this is simply a collection of nerves, creating a nerve net.
Yes, platyhelminthes are diploblastic, meaning they have two primary germ layers during embryonic development: the ectoderm and endoderm. They lack a mesoderm layer.
the body of diploblastic animals consists of two layers of cells, ectoderm and endoderm. there is a jelly like mesenchyme or mesoglea, between the two layers, which in most cases is non cellular. the body of triploblastic animals is made of three layers ectoderm, endoderm and mesoderm.
Yes, a protostome is, and so is a deuterostome. Neither are diploblastic. This is mainly because of the developement of the coelem or body cavity. Just remember, both protosome and deuterostome require a three germ layer (that is a triploblastic cell) - ALWAYS
It has always been a debate. Mesenchymal musculature in the middle tissue layer of ctenophores has invited speculation that they are triploblastic.