Archive | Invertebrate Zoology

Phylum Ectoprocta: Features, Classification and Affinities

In this article we will discuss about Phylum Ectoprocta:- 1. Characteristic Features of Phylum Ectoprocta 2. Classification of Phylum Ectoprocta 3. Affinities. Characteristic Features of Phylum Ectoprocta: 1. Phylum Ectoprocta are mostly marine and some are freshwa­ter animals. 2. Un-segmented, bilaterally symmetrical, sessile, colonial coelomate animals of trimeric construction except Monobryozoon which lives in solitary state. 3. The individuals or [...]

By |2016-05-27T11:32:20+00:00May 27, 2016|Phylum Ectoprocta|Comments Off on Phylum Ectoprocta: Features, Classification and Affinities
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Structures of Water Vascular System in Asterias

The following points highlight the eight different structures of water vascular system in Asterias. The structures are: 1. Madreporite 2. Stone Canal 3. Ring Canal 4. Polian Vesicles 5. Tiedmann's Bodies 6. Radial Canals 7. Lateral or Podial Canals 8. Tube-Feet (Podia) and Ampulla. Structure # 1. Madreporite: The water vascular system starts with the madreporite and gives off a [...]

By |2016-05-27T11:32:20+00:00May 27, 2016|Phylum Echinodermata|Comments Off on Structures of Water Vascular System in Asterias
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Ophiura: Example of Phylum Echinodermata

In this article we will discuss about Ophiura:- 1. Habit and Habitat of Ophiura 2. External Structures of Ophiura 3. Body Wall 4. Coelom 5. Digestive System 6. Respiratory System 7. Water Vascular System 8. Haemal System or Blood Lacunar System 9. Locomotion 10. Excretory System 11. Nervous System 12. Reproductive System. Contents: Habit and Habitat of Ophiura External Structures [...]

By |2016-05-27T11:31:34+00:00May 27, 2016|Phylum Echinodermata|Comments Off on Ophiura: Example of Phylum Echinodermata
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