Metazoan branches, Biology

Metazoan Branches

The Kingdom Animalia comprises all the multicellular animals (metazoans). These are divided into three branches:

  1. Mesozoa
  2. Parazoa
  3. Eumetazoa

The Mesozoa comprise a tiny single phylum (Phylum Mesozoa); the Parazoa comprise two phyla a tiny single phylum Placozoa and the rest make up the phylum Porifera comprising the sponges. Most of the metazoans come under the major branch Eumetazoa You must note that the cellular layers of Porifera (sponges) are not homologous to the germ layers of Eumetazoa. Their developmental pattern is also quite different from that of the Eumetazoa. The Parazoa are regarded as an early evolutionary side branch of the animal kingdom, which did not give rise to any other group of animals.

Posted Date: 1/15/2013 3:08:36 AM | Location : United States







Related Discussions:- Metazoan branches, Assignment Help, Ask Question on Metazoan branches, Get Answer, Expert's Help, Metazoan branches Discussions

Write discussion on Metazoan branches
Your posts are moderated
Related Questions
Admission to  the Hospital The  philosophy of  childcare, whether in the home, hospital, or  other community agency, should be consistently one of concern and support for the

Q. Causes of Mitral Regurgitation? Mitral regurgitation is the most common valvular abnormality seen in clinical practice. Different disease processes leading to mitral regurgi

Adult (Post natal) stem cells : act as repair system for the body replenishing specialized cells but also maintain the normal turnover of regenerative organs such as blood, skin o

Consumers - Biotic Components These are also called as phagotrophs or heterotrophs. The organisms grouped under this category cannot manufacture their own food but obtain the

Which of the following serves as a signal for the ribosome to begin translating the transcript? A. Addition of the poly a tail to the 3' end of the transcript B. Deamination

Conjugated Proteins Conjugated proteins are composed of easy proteins combined with a non- proteinous substance.  The non-proteinous substance is known as prosthetic group o

In what part of the human body ASchelminthes found?

What is meningitis? Meningitis is the generic name given to inflammation of the meninges, membranes that cover the central nervous system. Meningitis can have various causes (i

Write briefly on neural mechanism of learning?

Determine the prosthetic planning Complete prosthetic planning has to be done and the implants planned accordingly. Thereafter the surgical phase should be carried out. Once th