Those are graphs....
with population and size on Y and X axis respectively
Metanephridia differ from protonephridia in that selective reabsorption of materials occurs via cells lining the tubules in protonephridia and via capillaries in metanephridia is true.
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What are the Metanephridia?</h3>
Metanephridia gather the liquid from the celomatic hollow space via a funnel-like shape known as nephrostome. The coelomic fluid enters the tubulus, water and vitamins are reabsorbed, and the metabolic waste inclusive of ammonia, urea, or uric acid is excreted.
The principal distinction among protonephridia and metanephridia is that protonephridia are a community of dead-give up tubules with out inner openings, while metanephridia are a kind of excretory glands with a ciliated funnel starting into the frame hollow space.
Read more about the protonephridia :
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<span>Vulvodynia
is actually a medical term commonly used to describe a condition of severe and
long-lasting pain around or near the vaginal orifice. This condition lasts at
least 3 months. The irritation or burning sensation associated with this
condition makes a patient feel uncomfortable when having sex or sitting for
relatively long periods of time.</span>