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

Briefly discuss the specialized organelles., The nucleus comprise the genet...

The nucleus comprise the genetic information of cell. In addition to activities which maintain the cell, nucleus creates copies of itself for new protozoans by either asexual repro

How sugar is used in custards, How Sugar is used in Custards? While flo...

How Sugar is used in Custards? While flour protein forms the structure of baked goods, custards are composed of egg protein structures. If the egg white solidifies too early al

Explain about the deranged lipid profile, Explain about the Deranged lipid ...

Explain about the Deranged lipid profile? Lipids, as you are already aware, are important dietary constituents that include fats, steroids, phospholipids and glycolipids. A num

How yersinia enterolytica infection occurs, Normal 0 false fa...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4 How Yersinia enterol

Ecology, what is an ecosystem energy pathway

what is an ecosystem energy pathway

Operatory preparation in sterilization process, Q. Operatory Preparation in...

Q. Operatory Preparation in sterilization process? 1. The circulator (non-sterile assistant) should begin to prepare the operatory while the sterile assistant scrubs. If there

Why ph regulation is important for living beings, Q. Why pH regulation is i...

Q. Why pH regulation is important for living beings? How mineral salts participate in this regulation? The prospective of hydrogen (pH) is a measure of the amount of hydrogen i

An mrna molecule codifies only one type of protein, An mRNA molecule codifi...

An mRNA molecule codifies only one type of protein? Eukaryotic cells have monocistronic mRNA, i.e., every mRNA codifies only one polypeptide chain. Prokaryotes can present poly

Why are lysosomes known as the cleaners of the cell waste, Q. Why are lysos...

Q. Why are lysosomes known as "the cleaners" of the cell waste? Lysosomes carry out heterophagic and autophagic digestion autophagic digestion by digesting residual substances

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