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Metanephridia - Excretion
Metanephridia are found in coelomates (e.g., annelids). These animals have evolved a close circulatory system intimately associated with the excretory organs resulting in direct exchange of material between the two systems. In these worms an isosmotic fluid appears initially in the nephridium due to filtration of the coelomic fluid through the ciliary mesh of the nephrostpme. Salt is later withdrawn from the fluid as it passes through the extensively looped duct and finally dilute urine is discharged.
The secretary coil fills the lumen with a NaCl solution that is isotonic with the blood plasma. As this solution moves upward through the reabsorptive duct, NaCl is reabsorbed into
Q. Areas affected in peptic ulcer? The areas affected in peptic ulcer (due to erosion) can be: 1. Lower part of the oesophagus. 2, stomach (lesser curvature - an urn, whe
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Are bacteria the only prokaryotic beings? Prokaryotic beings are classified into two big groups: archaebacteria and bacteria (this last also known as eubacteria). Compared
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Define about the Metabolism of Copper? In food, most copper is present as Cu 2+ and some as Cu 1+ . This copper is bound to organic compounds especially protein. Gastric HCI p
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Species Diversity Species diversity means the differences between species (both domesticate d and wild). It is the most visible component of biodiversity as implied by the word
Radiant Warmer A radiant warmer is a device used to maintain the body temperature of the newborn and thus play an essential role in influencing oxygen consumption, apnea and
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