Protonephridia and metanephridia, Biology

Assignment Help:

Protonephridia and Metanephridia

Nephridia take place in two major forms - the protonephridium and metanephridium. Protonephridia are found in flat worms. The protonephridial canals end blindly in structures called flame cells or solenocytes internally. Flame cells comprise central cavities that are continuous with the cavities of tubules and consist of a bunch of cilia - the flame. Actually, the flame cell interdigitates along with the first cell of the tubule, by means of finger shaped processes. In solenocytes, the cell lumen is prolonged into a delicate tube and the flame is reduced to a single flagellum. Flat worms usually have a pair of protonephridia. The protonephridial canals are much branched bearing flame ceIls at the end of branches. The flame cells are found scattered during the parenchyma. The flame cells do the filtration; the filtered fluid is propelled by flagella. The nephridiaI epithelium performs the functions of reabsorption and secretion. These physiological mechanisms are comparable with those performed by a vertebrate kidney.


Related Discussions:- Protonephridia and metanephridia

Explain the occurrence of nictoinic acid, Explain the Occurrence of Nictoin...

Explain the Occurrence of Nictoinic acid Nictoinic acid occurs widely in the animal and vegetable kingdom in free as well as in bound form (in enzymes). Several animal organs

Implementation of the plan in diabetes mellitus, Q. Implementation of the P...

Q. Implementation of the Plan in diabetes mellitus? You have helped the client to find out an alternative solution and to develop a plan to solve the problem. Now, it has to be

Define mineral requirements during pregnancy period - iron, Define Mineral ...

Define Mineral Requirements during pregnancy period - Iron? While B 12 and folk acid are needed for the normal erythropoiesis, they must be accompanied by adequate amounts of

Comparison between metamorphosis in amphibians and insects, Comparison betw...

Comparison between Metamorphosis in Amphibians and Insects You may have realized that the metamorphic process in amphibians and insects show certain fundamental similarity. M

Define regulation of amino acid levels in the blood, Define Regulation of a...

Define Regulation of amino acid levels in the blood? Regulation of amino acid levels in the blood: Vitamin D helps to prevent loss  of amino acids through the kidney and thus

Define surface properties of proteins, Define Surface properties of Protein...

Define Surface properties of Proteins? The surface properties relates primarily to surface tension, emulsification and foaming characteristics of proteins, which are discussed

Pressure gradient, Pressure Gradient You know that air pressure is the ...

Pressure Gradient You know that air pressure is the weight of the atmosphere over a unit area of the earth's surface. The average air pressure at sea level is approximately 1 k

Proteins of animal origin - fish, Proteins of Animal Origin - Fish Fish...

Proteins of Animal Origin - Fish Fish: The edible portion is skeletal muscles of the body. Even though the skeletal muscles of different animals are basically similar, fish spe

Ant species in the two regions, Calculate a 95% confidence interval for the...

Calculate a 95% confidence interval for the difference among the average numbers of ant species in the two regions. Compare your results to SPSS output and interpret the confidence

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