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Is Mesoglea a Layer?
Is Mesoglea a Layer?
Sophia Al-Mansoor••6 min read
The mesoglea is a gelatinous, noncellular connective tissue layer. The inner gastrodermis
gastrodermis
The gastrodermis is the inner layer of cells that serves as a lining membrane of the gastrovascular cavity of Cnidarians. The term is also used for the analogous inner epithelial layer of Ctenophores. It has been shown that the gastrodermis is among the sites where early signals of heat stress are expressed in corals.
In cnidarians, the gastrovascular system is also known as the coelenteron, and is commonly known as a "blind gut" or "blind sac", since food enters and waste exits through the same orifice. ... This cavity has only one opening to the outside which, in most cnidarians, is surrounded by tentacles for capturing prey.
and is involved in digestion and absorption (Hyman, 1940).
What is called mesoglea?
Mesoglea refers to the tissue found in cnidarians like coral or jellyfish that functions as a hydrostatic skeleton. It is related to but distinct from mesohyl, which generally refers to tissue found in sponges.
Why is mesoglea not regarded as a mesodermal layer?
mesoglea The gelatinous noncellular layer between the endoderm and ectoderm in the body wall of coelenterates. ... It often contains cells that have migrated from the two body layers but these do not form tissues and organs and the mesoglea is not homologous with the mesoderm of triploblastic animals.
