In this article we will discuss about the spicules and gemmule of sponge. Spicules of Sponge: 1. The spicules are structures which form the supporting skeleton in sponges. 2. They may be either calcareous or silicious in nature. 3. They may be either monaxon (having one ray) triaxon (having 3 rays) or tetraxon (having 4 […]
Sponge: Spicules and Gemmule | Zoology
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Sponges: Definition, Features and Habitat | Phylum Porifera
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In this article we will discuss about Sponges:- 1. Taxonomic Retrospect of Sponges 2. Definition and Origin of Sponges 3. General Features 4. Habitat 5. Structural Peculiarities 6. Development 7. Affinities 8. Regeneration 9. Phylogeny. Contents: Taxonomic Retrospect of Sponges Definition and Origin of Sponges General Features of Sponges Habitat of Sponges Structural Peculiarities of […]
Skeletal Elements Found in Sponges | Phylum Porifera
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The following points highlight the two main skeletal elements found in sponges. The types are: 1. Spongin 2. Spicules. Skeletal Element: Type # 1. Spongin: The spongin comprises of fibres of spongin and they resemble silk in appearance. These are proteinaceous secretion of the spongioblasts and form a network. In most cases, the spongin fibres […]
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