diploblastic cell system

biology

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June 25, 2026

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The term "diploblastic" refers to organisms that develop from an embryo with two primary germ layers: the ectoderm and the endoderm. These layers form during a process called gastrulation.12

Diploblastic animals, such as cnidarians (like jellyfish) and ctenophores (comb jellies), are organized at a tissue level of organization. They lack a true mesoderm, which is the middle germ layer found in triploblastic (three-layered) animals. Between the ectoderm and endoderm, diploblastic animals have a gelatinous layer called the mesoglea. This body plan is characteristic of simpler multicellular organisms.3415

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…anemones, jellyfish, and corals—has a diploblastic level of organization (i.e., its members have two layers of cells). The outer layer, called the ectoderm, and the inner layer, called the endoderm, are separated by an amorphous, acellular layer called the mesoglea; for these animals, bathing both cellular surfaces with environmental fluid…
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…anemones, jellyfish, and corals—has a diploblastic level of organization (i.e., its members have two layers of cells). The outer layer, called the ectoderm, and the inner layer, called the endoderm, are separated by an amorphous, acellular layer called the mesoglea; for these animals, bathing both cellular surfaces with environmental fluid…
Read More