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Nephridiopores are present in ventral region. The nephridium consists of an opening called the nephrostome , a long convoluted tubule , and another opening called the nephridiopore. Body fluids are filtered in through the nephrostome and passed through the convoluted tubule system. [ 3 ]
Thus each worm becomes the genetic father of some of their offspring (due to its own sperm transferred to other earthworm) and the genetic mother (offsprings from its own egg cells) of the rest. As the worm slips out of the ring, the ends of the cocoon seal to form a vaguely onion-shaped incubator in which the embryonic worms develop. Hence ...
The function of these cells is to regulate the osmotic pressure of the worm, and maintain its ionic balance. Microvilli in the tube cell may be used to reabsorb some ions. [1] Molecules enter the tubule in tube cells through the gap between the flame cell and tube cell for excretion. [2]
Hikers risk polluting the “clearest lake in the world” with a microscopic alga carried on their boots.
Fossil of a worm that was once considered as leech but denied, from the Waukesha Biota, in the Silurian of Wisconsin The most ancient annelid group consists of the free-living polychaetes that evolved in the Cambrian period, being plentiful in the Burgess Shale about 500 million years ago.
A worm that slithers like a snake and has the head of a shark and the Missouri Department of Conservation is warning residents to keep an eye out for them. The hammerhead worm is showing up more ...
The dress code for the 2025 Met Gala has been announced, and this year menswear is taking center stage.. In conjunction with the upcoming exhibit at the Metropolitan Museum of Art's Costume ...
The sperm are formed into little balls called spermatophores by specialist organs. When dispersed, they become amoeboid and make their way through the body wall of an adult worm before fertilising eggs in the metacoel. The resulting zygotes make their way out through the nephridiopores and become planktonic larvae. [4]