Structure of blastula, Biology

Structure of Blastula

The structure of blastula turns into modified in several animal groups. The changes are related to the amount of yolk deposited in the egg, as you will see from the accounts of blastula structure in some deuterostome animals. The blastula of the echinoderm sea cucumbers contains a fluid filled blastocoel surrounded via a single layer of cuboidal blastomeres that constitute the simple epithelial blastoderm. In the blastulae of sea urchin and Amphioxus, the blastoderm surrounding the blastocoel is an epithelium containing a single layer of columnar cells (blastomeres). Though, the vegetal blastomeres are larger than animal blastomere that is why the epithelium is thicker at the vegetal pole and thinner at the animal pole. So the polarity of the egg persists in the blastula.

Posted Date: 1/25/2013 1:29:34 AM | Location : United States







Related Discussions:- Structure of blastula, Assignment Help, Ask Question on Structure of blastula, Get Answer, Expert's Help, Structure of blastula Discussions

Write discussion on Structure of blastula
Your posts are moderated
Related Questions
Q. How does digestion in beings of the phylum Annelida work and which type of digestive system do they have? Digestion in beings of the phylum Annelida is extracellular. These


Osmotic pressure is the pressure formed in a aqueous solution by a region of lower solute concentration upon a region of superior solute concentration forcing the passage of water

Q. Can you explain about thoracic Aortography? Aortic arch angiography has been used to assess aortic valve or aortic root disease. Thoracic aortography is helpful for assessm

Categorisation of Neuropsychological Assessment One can divide neuropsychological assessment into two areas: i) Comprehensive and ii) Specialised assessment. Comprehen

Define the meaning of Open Kettles? A number of foods can be satisfactorily concentrated in open kettles which are heated by steam. This is the case for jellies and jams, toma

Organogenesis - Plant Tissue and Organ Culture Organogenesis refers to the differentiation of organs such as roots, shoots or flowers. Shoot bud differentiation may occur dire

RESPIR A T ORY ORGANS IN ANIMALS - In Protozoa plasmalemma functions as respiratory surface. In Porifera, respiration occur through body wall. In Coelentrata resp

Q. How are the nervous and the symmetry system characterized in echinoderms? Adult echinoderms, along with cnidarians, are the animals that present radial symmetry that is thei

Q. What is constitutional unit of proteins? The constitutional units of proteins are the amino acids.