Types of individuals in cnidaria, Biology

Types of individuals in Cnidaria

There are two forms of individuals in Cnidaria:

  1. Polyp
  2. Medusa

Polyp is tubular, the oral end being free carrying a whorl of tentacles, and the aboral end attached to the substratum by the basal disc. The polyp is sedentary, benthic type. The medusa is the free-swimming umbrella-like pelagic form, with mouth at the end of the manubrium on the subumbrella side. Though polyp and medusa may appear to be quite different in form, they have basically the same plan with an outer layer of epidermis and a gastrodermis lining the gastrovascular activity with a gelatinous layer of mesoglea in between them. The mesoglea in the medusa is, however thicker (hence the term jelly fishes), and one form can be theoretically derived from the other. The gastrovascular cavity servers as the alimentary canal opening to the outside through just only one opening the mouth.

Posted Date: 1/23/2013 12:09:43 AM | Location : United States







Related Discussions:- Types of individuals in cnidaria, Assignment Help, Ask Question on Types of individuals in cnidaria, Get Answer, Expert's Help, Types of individuals in cnidaria Discussions

Write discussion on Types of individuals in cnidaria
Your posts are moderated
Related Questions
What is Cellular grade? Explain in brief. Organisms with this kind of cellular organization are referred to as the parazoan. They have distinct cells which function independent

The difference b/n algae,bryophyte&pteridophyte?

Why is complementary base pairing important in DNA structure? Complementary base pairing is important because the hydrogen bonds between the bases hold the two strands of DNA

Who is known as Father of English Botany? William Turner (1515-1568), whose 'A New Herbal' printed in English appeared in 1551 (first part), 1562 (second part) and 1568 (third

Write about 25 parasites of protozoans? And writ the class family and full history about these parasites?

Spiracular Control - Respiration Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

How many carbon dioxide molecules are liberated after each cycle of the Krebs cycle? For a single glucose how many carbon dioxide molecules were already liberated by the aerobic re

Enumerate about the Reitan Aphasia Screening Test This test serves two purposes in that it contains both copying and language-related tasks. As an Aphasia screening procedure,

what effects do human technologies have on our water systems?

Explain the Structure and Functions of Kidney You would have got a clear idea as to where the kidneys are situated. Yes, the kidneys are located in the posterior part of the ab