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Dictionary » E » Excretion

Excretion

Definition

noun

(1) The process, act or function of discharging or ejecting waste product of metabolism, especially from the system of an organism.

(2) The excreta, or the waste material eliminated by excretion.


Supplement

Word origin: Latin excrētiōn- (s. of excrētiō) that which is sifted out.
Related forms: excrete (verb)

Compare: secretion


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Excretion and Osmoregulation in Phylum Platyhelminthes?

I may be explaining basics to you, since I am learning this concurrently, so I apologize in advance if necessary. Most excretion takes place by diffusion, although there is the excretory and osmoregulatory structure called the protonephridia. They are tubes with flame bulbs at the ...

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by plasmodesmata11
Tue Feb 24, 2009 2:46 am
 
Forum: Zoology Discussion
Topic: Excretion and Osmoregulation in Phylum Platyhelminthes?
Replies: 2
Views: 836

Excretion and Osmoregulation in Phylum Platyhelminthes?

We are study Platyhelminthes in my zoology class and I was trying to read the section on excretion and osmoregulation. It was confusing, and I simply cannot comprehend it at all. Would someone PLEASE help me understand it by either explaining it or helping me find a ...

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by MusicSavesYourLife
Sun Feb 22, 2009 1:33 am
 
Forum: Zoology Discussion
Topic: Excretion and Osmoregulation in Phylum Platyhelminthes?
Replies: 2
Views: 836

Re: Homeostasis.

... homeostasis and in relation to their specific requirements. End with humans. 3.Human Homeostasis: -What is controlled and what controls it: Eg Excretion osmoregulation and pH control --> kidney -Use histological details to explain the process. 4.End by mentioning diseases that disrupt homeostasis ...

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by favorina
Fri Jan 30, 2009 8:14 pm
 
Forum: Human Biology
Topic: Homeostasis.
Replies: 6
Views: 4499

Glucose equilibrium within a cell

... glucose would diffuse into the cell? and is that formation "rapid and continuous"? (other options I eliminated were: *the continuous excretion of glucose from other parts of the cell *the active transport of glucose out of the cell) Thanks in advance for your help!

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by Splendiferous
Mon Dec 29, 2008 4:46 pm
 
Forum: Cell Biology
Topic: Glucose equilibrium within a cell
Replies: 2
Views: 851

Reproduction

Hi, I remember learning that the site of gamete release and excretion of urine is the same for males. In this case, it will be called the urethra. What about females? Females excrete their urine through the urethra too but where does sperm enter to reach ...

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by Maruko
Wed Aug 13, 2008 8:05 pm
 
Forum: Physiology
Topic: Reproduction
Replies: 4
Views: 2015
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