quora
Nobody downloaded yet

OSMOREGULATION IN CLAMWORMS - Essay Example

Comments (1) Cite this document
Summary
Neries belongs to the division Annelida and class Polychaeta. The worm has 160 segments with well developed setose parapodia. They are the common in tropical and temperate marine habitats. Their native is American Atlantic coasts. They are the large common estuarines. …
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER98.2% of users find it useful
OSMOREGULATION IN CLAMWORMS
Read TextPreview

Extract of sample
"OSMOREGULATION IN CLAMWORMS"

Download file to see previous pages They are the large common estuarines. They are also found on the brackish waters. (Oglesby, 1968). Now they are also found at Africa, coastal Europe and Southern Australia. They grow to a height of 190 mm and lives for one year. They reproduce sexually. The most important characteristic of this species is that they are able to withstand the temperature range of 12 - 35°C and survive at a salinity range of 65 ppt for long time and 80 ppt for short time. They are good osmoregulators. Osmoregulation is na active regulation of the osmosis pressure of the body fluids (mainly water) with that of the environmental conditions. Osmosis is maintained both by the terrestrial and marine animals. They do so by excretion through the organs such as kidney and skin. Osmoregulation is of two types, they are osmoregulators and osmo conformers. Osmoregulators are strict regulators of salt and water concentration in the body to that of the environment. osmoconformers match their body fluid concentration to that of the environment.(Masterson, 2008). Neries virens species is able to withstand the salt water content from 5 % to 100%. Some studies have found that they are also able to withstand twice the salt concentration that of salt water. They are only slightly hyperosmotic whereas most of the worms are in osmotic equilibrium with the sea. Review of literature: The body fluids of Nereis are isoosmotic for the sea water. Osmoregulation is one of the important functions of the gut, dorsal pores and the body surface. The salts are transported by active transport and the water by osmosis. Osmosis is the movement of the water (solvent) from high concentration to low concentration across a semi permeable membrane. Here the cell membrane acts as the semi permeable membrane. The influence of the sea water on the weight of the body. The greater the dilution, the greater the increase in the body weight. The worm tends to accommodate itself to the new environment. After the increase in the body weight, they tend to return back to the normal weight if they are left in the original sea water. These euryhaline osmoregulators are thus capable of surviving in reduced, increased salinity levels. They are found to show two types of blood osmo regulation. First they act as hyper osmotic in the diluted sea water with greater osmo regulatory control. Two important mechanisms are stated for this hyper osmotic capability. The transport of the body salts from the body surface to the body fluid through the medium. The second mechanism is by the reduction of the permeability of the body surface to the solutes and solvents. (Oglesby, 1968). For increasing salt concentrations of upto 2 times the salt concentration they act as hypo- osmotic. The concentration of salt in sea water is 1000 m – Osmole / liter and the blood of Nereis contains about 340 – 500 m – Osmole / liter at marine conditions and 280 – 360 m – Osmole / liter at the fresh water levels. The pH of the coelomic fluid was found to increase as the salinity of the water increases. If the salt concentration is higher at the outer environment, the water moves out of the body of the Nereis and thus loses its weight in order to maintain the osmotic pressure as constant. They adapt to the environment very quickly because of the well developed excretory organs. Pronephridia are the excretory and osmoregulaatory organs that are able to drive out the excess water and the waste products. (Whitton, 1975). Another study investigated the osmotic stress due to the long term assimilation and short term assimilation of salinity changes. A single worm was exposed to different salt concentration at different time intervals for a period of 14 days and the changes in weight were measured at continuous time intervals. Another worm ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“OSMOREGULATION IN CLAMWORMS Essay Example | Topics and Well Written Essays - 1250 words”, n.d.)
Retrieved de https://studentshare.org/biology/1433950-osmoregulation-in-clamworms
(OSMOREGULATION IN CLAMWORMS Essay Example | Topics and Well Written Essays - 1250 Words)
https://studentshare.org/biology/1433950-osmoregulation-in-clamworms.
“OSMOREGULATION IN CLAMWORMS Essay Example | Topics and Well Written Essays - 1250 Words”, n.d. https://studentshare.org/biology/1433950-osmoregulation-in-clamworms.
  • Cited: 0 times
Comments (1)
Click to create a comment or rate a document
te
terrill94 added comment 2 days ago
Student rated this paper as
Wonderful work done on the "OSMOREGULATION IN CLAMWORMS". I think it is the best essay I have seen so far.
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Osmoregulation In Kidney
Each kidney is composed of 1.2 million nephrons from where the blood passes in the form of filtrate removing nitrogenous waste. The movement of this filtrate from the glomerular (Bowman’s) capsule to a series of tubules help in retaining most of the water, salts and other functional materials like glucose, vitamins etc.
3 Pages(750 words)Assignment
Physiology for health
A better understanding of the physiology of health includes answering the following questions: 1. Explain homeostatic mechanism? 2. Describe how homeostatic mechanism work to regulate osmoregulation and thermoregulation process? 3. Explain the function of cardiovascular and respiratory system in regulating body mechanisms?
4 Pages(1000 words)Essay
Homeostasis
Thus internal environment of the body is maintained by a close surveillance system and timely response to any change which may affect homeostasis. This adjustment of physiological systems within the body is called homeostatic regulation (Wikiepedia 2007).
4 Pages(1000 words)Essay
Kidney Dialysis and Kidney Transplantation
Toxins and other harmful substances, come from various sources such as the environment (in the air, water and other environmental factors), from our food especially those laced with high amounts of preservatives and artificial flavours, from the liquids that we drink such as alcoholic drinks and liquid medicinal preparations, and from imbibed poisons taken in accidentally or intentionally.
4 Pages(1000 words)Essay
Homeostasis
For the purpose of this paper, we will be limiting the reference to humans as organisms. The search and removal of wastes inside the body which it produces, is called the process of excretion (Poison Protection). The major organs of excretion are the kidneys for urine elimination, the large intestines for expelling of solid wastes, the lungs for expelling carbon dioxide and water vapor, and the skin for eliminating salt and water through sweat.
4 Pages(1000 words)Essay
Comparative Vertebrate Anatomy
The body temperature of seals is protected by their thick layer of subcutaneous blubber against their living environment's (cold sea water) temperature which is ranging from 0 to 15C. Their flippers though can not be covered with subcutaneous blubber because it will interfere with its function as paddles and fins.
6 Pages(1500 words)Essay
Water is the predominant constituent of all of the bodies tissues. Discuss and compare the roles of water in cellular tissues and the connective tissues
Most of the animal cells are bound by the plasma membranes which are permeable to water and the total water content is maintained in a state of homeostatic equilibrium by the forces of osmotic pressure. Any change in
4 Pages(1000 words)Essay
Task
The simple nature of the single-celled organisms is attributed to their diverse characteristics which distinguish them from their eukaryotic counterparts. For instance, prokaryotes (pro=
5 Pages(1250 words)Essay
Homestasis
The process helps keep internal chemical environment constant. This is called homeostasis. The organs which remove the waste products of metabolism from the animal body are termed excretory organs. In man and other vertebrates the
5 Pages(1250 words)Essay
Homeostasis in humans
Body organs work in great coordination to deliver the results that are required for the body to function. Temperature, pH, oxygen level and electrolyte concentrations are optimal conditions that
7 Pages(1750 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Essay on topic OSMOREGULATION IN CLAMWORMS for FREE!
logo footer
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us