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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 Salt is later withdrawn from the fluid as it passes through the extensively looped duct and finally dilute urine is discharged.
Define Determinants of Food Security - Food Access? Food access is linked to its affordability. Food access is ensured when households and all individuals within them have adeq
Biologists established that new cells Consequent to this doctrine, biologists established that new cells are formed by cell division and by the end of the nineteenth century, t
fertilization occurs when the ?
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