Pseudocoelom - metazoa, Biology

Pseudocoelom - Metazoa

The platyhelminths which do not have a body cavity surrounding the gut, have a solid type of body constitution. The mesoderm completely fills the space between body wall and alimentary canal in the form of a network of cells called parenchyma. Such animals are called acoelomates. In nematodes, there is a different situation:

675_Pseudocoelom.png

Figure:  Section of (a) acoelomates (b) pseudocoelomates

the mesoderm is confined to specific circumscribed regions within the body cavity, and this cavity is neither lined nor filled with mesoderm. The cavity is in fact a persistent blastocoel of the embryo and is called pseudocoel. The internal organs are free within the pseudocoel. The body cavity has no lining of peritoneum derived from mesoderm. Animals so constructed are called pseudocoelomates.

Posted Date: 1/15/2013 2:13:58 AM | Location : United States







Related Discussions:- Pseudocoelom - metazoa, Assignment Help, Ask Question on Pseudocoelom - metazoa, Get Answer, Expert's Help, Pseudocoelom - metazoa Discussions

Write discussion on Pseudocoelom - metazoa
Your posts are moderated
Related Questions
Cytochemistry It is well known that certain stains and dyes specifically combine with certain chemical components of the cell. Cytochemical techniques take advantage of this fa

Which organs of the body are part of the human digestive system? The digestive system, also called as "systema digestorium", or gastrointestinal system, is composed of the dige

WHAT IS SYMBIOTIC THEORY. PLEASE EXPLAIN THIS TO ME IN A VERY SIMPLE WAY.


Explain the DNA structure in details? Structure :  Each DNA molecule is a double stranded polymer, consisting of perhaps thousands or millions of linked nucleotides. The two

Pox diseases Small-pox in human beings and pox in a few animal species are closely related to each other. It is shown by the fact that the vaccine for the prevention of small

What is plant cell walls made of? Explain the function of cell walls? Plant cell walls are made of cellulose embedded in carbohydrates and proteins. Cell walls help su

Q. How are inhalation and expiration carried out? The diaphragm exclusive of mammals and the intercostals muscles can contract or relax varying the volume of the thorax the com

What is the clitellum of earthtworms and where it is located? The clitellum is a special region of the annelid constituted by rings (metameres) with reproductive function. It c

A group working at the University of California, Berkeley has developed "nanothermometers," little nanoparticles that can be injected into cells to measure the temperature in vario