Mesohyl
The mesohyl, formerly known as skeletal elements.
For a long time, it has been largely accepted that sponges lack true tissue, but it is currently debated as to whether mesohyl and pinacoderm layers are tissues.
The mesohyl is composed of the following main elements:
cellular growth
.
The mesohyl includes a noncellular colloidal mesoglea with embedded collagen fibers, spicules and various cells, being as such a type of mesenchyme.[1]
References
- ^ Brusca, R.C. & Brusca, G.J. (2003). Invertebrates. 2nd ed. Sunderland, Massachusetts: Sinauer Associates, p. 183.
Bibliography
- Lytle, Charles F.; Meyer, John R. (May 21, 2004). General Zoology Laboratory Guide (Fourteenth ed.). New York: McGraw-Hill. ISBN 978-0-07-234900-9.
- Müller, Werner E.G. (February 2003). "The Origin of Metazoan Complexity: Porifera as Integrated Animals". Integrative and Comparative Biology. 43 (1): 3–10. PMID 21680404.