Tag Archives | Sponges

Sponge: Spicules and Gemmule | Zoology

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 rays). 4. Some times they [...]

By |2016-10-13T19:19:13+00:00October 13, 2016|Zoology|Comments Off on Sponge: Spicules and Gemmule | Zoology

Sponges: Definition, Features and Habitat | Phylum Porifera

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 Sponges Development of Sponges Affinities [...]

By |2016-05-27T11:35:53+00:00May 27, 2016|Sponges|Comments Off on Sponges: Definition, Features and Habitat | Phylum Porifera

Skeletal Elements Found in Sponges | Phylum Porifera

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 are composed of protein, termed [...]

By |2016-05-27T11:35:53+00:00May 27, 2016|Sponges|Comments Off on Skeletal Elements Found in Sponges | Phylum Porifera
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