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

Counselling of pace programme, Q. Counselling of PACE programme? Counse...

Q. Counselling of PACE programme? Counselling is a key component of a PACE programme. Counselling is a process that enables a person to identify problems and find a solution or

Discuss about the halstead reitan battery, Discuss about the Halstead Reita...

Discuss about the Halstead Reitan battery The Halstead Reitan battery continues to be widely used as a clinical and research procedure. Numerous investigators use it in their r

Why can the genetic code be qualified as a degenerate code, Why can the gen...

Why can the genetic code be qualified as a "degenerate code"? The genetic code is a degenerate code because there are amino acids codified by more than one type of codon. It is

What do you mean by lofenalac, Q. What do you mean by Lofenalac? Lofena...

Q. What do you mean by Lofenalac? Lofenalac is a formula which is nutritionally complete except for phenylalanine. This formula is the main diet for the infants suffering from

Biochemical nutrient cycle, What are some ways that humans can reduce the e...

What are some ways that humans can reduce the effect they have on the phosphorus cycle?

Integumentary system - hair, HAIR Presence of hair is main feature ...

HAIR Presence of hair is main feature of mammals, absent in whale fish. Soft hair in embryo of animals are lanugo. Study of hair is tricology . Part of hair which

Where can rna are found within cells, In the eukaryote cell nucleus, RNA ca...

In the eukaryote cell nucleus, RNA can be found dispersed in the nuclear fluid, along with DNA, and as the major constituent of the nucleolus. In cytosol (in eukaryotes or in bacte

What is difference between analogous and homologous organs, What is the dif...

What is the difference between analogous and homologous organs? The Characteristics of different species are said to be analogous when having the same biological function, for

In what ways does over-grazing lead to soil erosion, In what ways does over...

In what ways does over-grazing lead to soil erosion? Over-grazing leads to erosion because (i) the animals delete all the vegetation, so exposing the soil to heavy rain, (ii) t

Airway management - respiratory failure, Airway Management To improve...

Airway Management To improved ventilation, suctioning, IPPB, Ultrasonic mist therapy and postural drainage with clapping and vibrating are all employed to halt the progress o

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