Metazoan branches, Biology

Assignment Help:

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.


Related Discussions:- Metazoan branches

Erythrocytic cycle, Erythrocytic cycle The cycle that takes place i...

Erythrocytic cycle The cycle that takes place in the body of man who is considered as secondary host is called the erythrocytic cycle. The first stage of the cycle begins

Theoretical calculation of calorific value of a fuel, The calorific value o...

The calorific value of a fuel can be theoretically determined by using dulong's formula. It is assumed that heat evolved comes from the combustion of carbon, hydrogen, and sulphur

Respiration, abnormal lung volumes and capacities

abnormal lung volumes and capacities

Embryonic development, Embryonic Development The embryonic stage exte...

Embryonic Development The embryonic stage extends from the second week by the 8th week and is charactrised by formation of placenta, the development of internal organs and ap

Determine in brief about the mse, Determine in brief about the MSE The ...

Determine in brief about the MSE The MSE deals with questions concerning the addressee's Consciousness, Emotional State, Thought Content and Clarity, Memory, Sensory Perception

Population parameters and regulation, Population Parameters and Regulation ...

Population Parameters and Regulation Population can be defined as a group of organisms of same species occupying a specific area at a particular time, such as all the deer or

Explain cardiac disease, Explain Cardiac disease Cardiac conduction abn...

Explain Cardiac disease Cardiac conduction abnormalities associated with Lyme disease are generally self-limited. Patients with minor cardiac involvement (first-degree atrioven

Spring overturn - overturn, Spring overturn - Overturn In spring and e...

Spring overturn - Overturn In spring and early summer season the increased solar radiation melts the ice cover, which, as it attains a temperature of 4° Celsius, becomes dense

Implantable cardioverter defibrillator, Patients with aborted sudden death,...

Patients with aborted sudden death, hemodynamically unstable ventricular arrhythmias, and unexplained cardiogenic syncope are at high risk for fatal ventricular arrhythmias. If the

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd