planarian


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planarian

(plə-nâr′ē-ən)
n.
Any of various small, chiefly freshwater flatworms of the order Tricladida, having a soft, broad, ciliated body, a three-branched digestive cavity, and the ability to regenerate body parts.
References in periodicals archive ?
In planarians, they stick around into adulthood, where they become known as adult pluripotent stem cells or neoblasts.
Planarian seizure-like activity (pSLA) is defined as asynchronous paroxysms resulting in a sudden disruption of normal spontaneous locomotor activity, in response to proconvulsive drugs [28, 29].
Geoplana lucasi, Dendy.--This is a remarkable and very rare planarian, of unusually large size, and with black and white markings.
"Human counterparts exist for most of the genes that we have found to regulate the activities of planarian stem cells," said Sanchez Alvarado.
Reproductive ecology and evolution in the invasive terrestrial planarian Bipalium adventitium across North America.
In this study, our main interest was to demonstrate the high level of neurobiological development of the Onychophora, as shown by the presence of cephalic ganglion, well-differentiated neurons characterized by a high production of synaptic vesicles, and having a proportionality of their cytoplasm and nucleus very much similar to that of planarian neurons (Reuter 1981, Biserova et al.
Because planarian stem cells share characteristics with those of humans, the work will aid scientists to understand how stem cells can completely repair damaged tissues and organs.
Andy Lavender, Maryville High School, Title: A Study of Planarian Memory.
Chop a planarian into two pieces and each piece will develop the missing parts and become a separate planarian; the bead of one (or the left side) is identical to the corresponding part of the original; the tail of the other (or the right side) is identical to the tall of the original.
S100-like immunoreactivity in a planarian. An immunochemical and immunocytochemical study.
This planarian's head was split in half (below), and it grew back as two complete heads.