In this article we will discuss about the role and evolutionary significance of canal system in sponges. Role of Canal System: The canal system which draws water current inside the sponge's body and maintains a continuous uninterrupted flow of water, plays a vital role in the physiology of sponges, because it serves the various kinds of functions. (i) Nutrition: The [...]
The following points highlight the three main types of canal system encountered in sponges. The types are: 1. Ascon Type 2. Sycon Type 3. Leucon Type and 4. Rhagon Type. 1. Asconoid Type: The asconoid type of canal system is regarded to be the most simple and primitive grade of canal system. Asconoid type is present in these sponges whose [...]
In this article we will discuss about Sponges:- 1. History of Sponges 2. Definition of Sponges 3. Origin 4. General Characters 5. Classification 6. General Organisation 7. Canal System 8. Skeleton 9. Reproduction 10. Development 11. Animal Nature 12. Affinities 13. Economic Importance. Contents: History of Sponges Definition of Sponges Origin of Sponges General Characters of Sponges Classification of Sponges [...]