Echinodermata - regeneration in invertebrates, Biology

Echinodermata - Regeneration in Invertebrates

Asteroids (starfishes), ophiuroids (brittle stars) and crinoids (sea lilies) can reproduce their lost arms and although parts of their disc. The arms of starfishes show autotomy. When disturbed or caught by a predator they cast off one or more arms near the base and regenerate them again. In Linckia species an arm completely devoid of any pan of disc regenerates the complete body. Such types of regenerating sea stars are called comets. Brittle stars and sea lilies as well practice autotomy in distress conditions and can regenerate their arms from the remaining part of the arm. Autotomy is specifically striking in sea cucumbers (Holothuroidea) which, when startled or disturbed, can eject by their anus all their internal organs, specifically the respiratory tree and alimentary canal. This spontaneous 'self-evisceration' is followed by complete regeneration of the viscera. If transversely bisected each half of the holothurians, regenerates the missing half to whole the body.

Posted Date: 1/31/2013 6:16:29 AM | Location : United States







Related Discussions:- Echinodermata - regeneration in invertebrates, Assignment Help, Ask Question on Echinodermata - regeneration in invertebrates, Get Answer, Expert's Help, Echinodermata - regeneration in invertebrates Discussions

Write discussion on Echinodermata - regeneration in invertebrates
Your posts are moderated
Related Questions
Permeability Permeability is the ability of a soil to transmit water or air. Permeability or infiltration rate is measured in terms of the rate of water flow through the soil i

Q. What is Subxiphoid Short Axis Sweep? To obtain the subxiphoid short axis view transducer should be rotated by 90 degree clockwise, fi-om the previous position so that p

Q. Etiological factor of gastritis? Some most frequently associated risk factors for gastritis include: • Faulty dietary habits like overeating and taking highly seasoned fo

Q. Of which kind of tissue are bones and cartilages made? Cartilages and Bones tissues with great amount of intercellular material are formed of connective tissue. Q. Are t

Select all that are true/correct: Stable atoms have no vacancies in their outer shell. Hydrogen is more stable than carbon Helium is more stable than carbon Helium is more stable t

pictures for hetrotrophic and autotrophic mode of nutrition

Define the Starch gel electrophoresis? Starch gel has the advantage of fine texture and absence of protein adsorption with a molecular sieving effect retarding proteins of larg

wich variables are controlled when conducting a phototropism experiment

Q. What are mycotoxins? How are these produced and where are these found? Are these naturally-occurring or produced? What is their significance? First what are mycotoxins?

Describe Class Ophiuroidea in general way? Brittle stars have a central disc with five long, thin, flexible arms that can be detached from the body at will in times of danger.