Marine animals, Biology

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.

Posted Date: 1/16/2013 2:38:31 AM | Location : United States







Related Discussions:- Marine animals, Assignment Help, Ask Question on Marine animals, Get Answer, Expert's Help, Marine animals Discussions

Write discussion on Marine animals
Your posts are moderated
Related Questions
How is energy transferred along a food chain? The energy flux beside a food chain is always unidirectional, from the producers to the decomposers.

What is the significance of Axial skeleton? The bones which make up skeleton of the main body axis of vertebrates. It comprise the cranium, vertebral column, and rib cages, How

Classical swine fever (hog cholera) Swine fever, known as hog cholera or European Swine Fever is a highly infectious virus disease characterized by rapid spread and high morbi

Q. What is the importance of pre procedural rinse? Patients' use of an anti-microbial mouthwash of 0.12% chlorhexidine gluconate solution for 30 seconds prior to intra-oral pro

Q. Fats requirement in chronic diarrhoea? Total amount of fat may be restricted as its digestion and absorption is compromised. In order to increase on the calorie density of t

Do plants have tissue organization and specialized organs? Plants have specialized organs (as reproductive organs, roots, limbs, leaves) and differentiated tissues (vascular t

Q. In which period of meiosis does the pairing of homologous chromosomes occur? The pairing of homologous chromosomes is a very important step for meiosis because the rightness

Q. Describe Cultural Characteristics of Microorganisms? Bacterial growth in and on foods often is extensive enough to make the food unattractive in appearance or otherwise obj

Characteristics of Lake Ecosystems The environment of static waters of lakes and ponds sharply contrasts with those of lotic ecosystems. Light penetration in lakes is usually

Q. Which Foods are used by Microorganisms for Energy? The carbohydrates, especially the sugars, are most commonly used as an energy source, but other carbon compounds can also