फ्री-तैराकी ज्यादातर ताजे पानी के फ्लैटवर्म; खोए हुए हिस्सों को पुनर्जीवित करने की क्षमता के लिए प्रयोगशाला अध्ययन में लोकप्रिय

planarians शब्द के हिंदी अर्थ का उदाहरण:

प्लैनेरियनों (Planarians) के टुकड़े हो जाने पर प्रत्येक टुकड़ा अलग प्राणी बन जाता है।

জজজ

planarians's Usage Examples:

As the Turbellaria (Planarians) are the most primitive division of the Platyelmia, the problem of the affinities of this phylum resolves itself into that of the relationships of the Turbellaria.

Within this muscular tube lies a parenchymatous tissue which may be uniform (Cestodes) or differentiated into a central or digestive, and a peripheral portion (some Turbellaria), or finally the central portion becomes tubular and forms the digestive sac (Trematodes), while the peripheral portion is separated from it by a space lined in some forms by a flattened epithelium (most Planarians).

The Planarians are free-living animals, the Trematodes are parasitic upon and within animals, and the Cestodes are wholly endoparasitic.

PLATYELMIA, a phylum of the animal kingdom which comprises three classes, the Planarians, Trematodes and Cestodes.

From these are given off at irregular intervals short lateral branches, each of which terminates in a flame-cell (f) precisely similar in structure to the flame-cells found in Planarians, Trematodes and Cestodes; here as there the question whether they are open to the body cavity or not must probably be answered in the negative.

The last structural peculiarity of the group is the absence of the functions of regulation and reparation which are so highly developed in the more primitive Planarians.

The concentration of nervous matter and ganglionic substance at the oral end of Trematodes is equivalent to the " brain " of the Planarians, but the similar thickening in the scolex of Cestodes is by no means so certainly to be called by that name.

Supposing the tube to be completely introverted and to commence its eversion, we then find that eversion may take place, either by a forward movement of the side of the tube near its attached base, as in the proboscis of the Nemertine worms, the pharynx of Chaetopods and the eye-tentacle of Gastropods, or by a forward movement of the inverted apex of the tube, as in the proboscis of the Rhabdocoel Planarians, and in that of Gastropods here under consideration.

Temnocephaloidea (see appendix tO Planarians).

Their structure has undergone little degeneration in connexion with this habit, and may be compared organ for organ with that of the Planarians.

planarians's Meaning':

free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost parts