Marine animals, Biology

Assignment Help:

Marine Animals

The composition of body fluids of marine invertebrates, including the ascidians are similar to seawater. Such animals need not expend much energy in regulating the osmolarity of their body fluids. In a few vertebrates too plasma is found isosmotic to their environment. In hagfish (Myxine), for example, the concentrations of ca2+, Mg2+ and SO2-4 are maintained significantly lower than they are in the seawater, whereas Na+ and Cl- are maintained higher in the body fluids than the seawater. Like the hagfish, the cartiligenous fishes such as sharks, rays and skates have plasma that is isosmotic to the seawater.

However, in these fishes the concentration of inorganic electrolyte is maintained far lower than the seawater. The excess inorganic electrolytes such as NaCl are excreted via the kidneys and also by means of a special excretory organ, the rectal gland, located at the end of the alimentary canal.


Related Discussions:- Marine animals

What is gene, What is gene? Gene is a sequence of DNA nucleotides that ...

What is gene? Gene is a sequence of DNA nucleotides that codifies the production of a protein.

Fidelity - synthetic characters, Fidelity - Synthetic Characters Fidel...

Fidelity - Synthetic Characters Fidelity refers to the degree to which a species is restricted in its occurrence to a particular kind of community. The species with low fideli

Zoology, Is viruses classified as living organism? If yes/no why

Is viruses classified as living organism? If yes/no why

Define drug effects on food intake - gastro intestinal tract, Define Drug E...

Define Drug Effects on Food Intake - gastro intestinal tract? Affect the gastro intestinal tract: Gastrointestinal irritation and ulceration are serious problems with many drug

Explain the meaning of protein deficiency, Explain the Protein Deficiency? ...

Explain the Protein Deficiency? One of the most common nutritional disorders in the world today is the deficiency of protein. Both adults and children are affected, as the popu

Phylum nematoda (nemathelminthes ), PHYLUM  NEMATODA (= NEMATHELMINTHES ) ...

PHYLUM  NEMATODA (= NEMATHELMINTHES ) Definition and Introduction                                                                             Bilateral  and protostomial

Beta - blockers, Beta-blockers have traditionally been considered contraind...

Beta-blockers have traditionally been considered contraindicated in patients with heart failure because they may block the compensatory actions of the sympathetic nervous system wi

New Technology, What is the best microscope to get a detailed view of the p...

What is the best microscope to get a detailed view of the parts inside of a preserved plant cell

What is covalent bonds, What is covalent bonds? Covalent Bonds :  Cov...

What is covalent bonds? Covalent Bonds :  Covalent bonds form when atoms share electrons in order to become more stable. Instead of gaining electrons or losing electrons enti

Can we make artificial cells, Q. Can we make artificial cells? Research...

Q. Can we make artificial cells? Research in progress at the "National Aeronautical and Space Administration (NASA)" is focused on artificial cells as a means to deliver medici

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