Echinodermata - regeneration in invertebrates, Biology

Assignment Help:

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.


Related Discussions:- Echinodermata - regeneration in invertebrates

Assessment of acute rheumatic fever, Assessment   While assessing the p...

Assessment   While assessing the patient with rheumatic fever, a detailed history including, problematic environmental factors or recent exposure to streptococcal infection is

Life style modification in management of diabetes mellitus, Life style modi...

Life style modification in the management of diabetes mellitus All of us have our own way of living. It becomes a routine when we do things in the same way. But when one falls

Biological conservation, what are the significance of zoological parks in c...

what are the significance of zoological parks in conversation

Indications for emergency surgery in ar, Indications for Emergency Surgery ...

Indications for Emergency Surgery in AR 1) Post balloon valvotomy AR with haemodynamic compromise 2) Acute thrombosis of prosthetic valve, not responding to thrombolysis

Briefly explain lichens organism, Briefly explain Lichens organism? Lic...

Briefly explain Lichens organism? Lichens are unique organisms consisting of a symbiotic relationship between a fungus and a photosynthetic organism. They represent a type of s

Define dietary management of sepsis with or without mods, Define Dietary Ma...

Define Dietary Management of Sepsis with or without MODS? Before we begin with the dietary management of patients suffering from sepsis with or without MODS let us read a case

General examination - heart failure, The patient will appear anxious and dy...

The patient will appear anxious and dyspnoeic. Patients in chronic heart failure are usually malnourished and even cachectic. Chronic passive venous congestion may produce exophtha

Name the mineral elements needed by bones, a) Name the mineral elements nee...

a) Name the mineral elements needed by (i) bones, (ii) red blood cells,  (iii) the thyroid gland b) Which of these elements is (i) present in milk, (b) lacking in milk?

Explain the malthus theory about population growth, Explain the Malthus' Th...

Explain the Malthus' Theory about population growth? Darwin's Theory was also based on Thomas Malthus' writings on population growth, in which he explained that populations gro

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