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Showing 1 to 20 of 27 for “"Flatworms"”.
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Comparative embryology and muscle development of polyclad flatworms (Platyhelminthes: Rhabditophora)
… case of true poecilogony reported for polyclad flatworms which may be a bet-hedging strategy in which benthic juveniles are recruited to the parental habitat, and concurrently, siblings disperse as larvae. The most notable feature of the development of P. cata was the unusual appearance of …
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Characterization of germ cell development in free-living and parasitic flatworms
… in the context of both free-living and parasitic flatworms. We use the freshwater planarian Schmidtea mediterranea to understand the functions of germ cell-specific genes crucial for the development and proliferation of early male germ cells. Additionally, we also characterize genes essential for …
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Systematics and taxonomy of polyclad flatworms with a special emphasis on the morphology of the nervous system
… nervous systems (CNS) of 12 species of polyclad flatworms belonging to 11 families were examined using traditional light microscopic techniques. Even though some morphological features of the CNS probably were related to the body shape and behavior of the species, three categories could be …
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Functional Studies of Stem Cells in the Parasitic Flatworm Schistosoma mansoni
Schistosomes are parasitic flatworms that infect over 200 million people, primarily in poverty-stricken developing countries, causing extensive morbidity and mortality. Schistosomes have a great deal in common with other parasitic flatworms such as liver flukes and tapeworms. Namely, they are …
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The Effect of Caffeine and Ethanol on Flatworm Regeneration.
<p>Flatworms, or planarian, have a high potential for regeneration and have been used as a model to investigate regeneration and stem cell biology for over a century. Chemicals, temperature, and seasonal factors can influence planarian regeneration. Caffeine and ethanol are two widely used drugs …
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The Influence of Geomagnetism on the Maze Behavior of Dugesia Tigrina
… concerned with investigating whether planarian flatworms are capable of learning in an instrumental conditioning paradigm, and whether or not this ability to learn is affected by orientation in the geomagnetic field.
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Flatworm Predation on Juvenile Freshwater Mussels
<p>Free-living flatworms (Phylum Platyhelminthes, Class Turbellaria) are important predators on small aquatic invertebrates. Macrostomum tuba, a predominantly benthic species, feeds on juvenile freshwater mussels in fish hatcheries and mussel culture facilities. Laboratory experiments were …
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Mechanisms Controlling Hatching of Winter Eggs of the Flatworm Mesostoma Ehrenbergii
Flatworms are the simplest of the triploblastic, bilaterally symmetrical protos tomes. As a group , they are worm-shaped with the body usually dorso-ventrally flattened. The epidermis is ciliated. | Most members of the class Turbellaria are free- living. Although planarians have frequently been …
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The instructive roles of muscle cells in planarian regeneration
… to correctly place new tissue. Planarians are flatworms with remarkable capacity to regenerate after nearly any injury and to indefinitely maintain tissue homeostasis. Dividing cells, neoblasts, are the source of all new tissue, whereas positional information is hypothesized to be harbored by …
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Comprehensive single-cell transcriptional profiling of the regenerative planarian Schmidtea mediterranea
… in a complete animal. Planarians are freshwater flatworms renowned for their capacity for whole-body regeneration. They possess a complex body plan with multiple distinct tissues. They also possess a population of dividing cells, called neoblasts, which contain pluripotent stem cells and are the …
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Exploring the interactions between schistosome eggs and the human host
Schistosoma flatworms are a genus of parasitic blood flukes that inhabit tropical and developing communities throughout Africa, Asia and South America. Infection with Schistosoma flukes causes the disease schistosomiasis, which results in approximately 200,000 deaths per year in Sub-Saharan Africa …
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Mechanisms of tissue-specific regeneration in planarians
… question of developmental biology. Planarian flatworms regenerate from diverse injuries, in each case precisely restoring body parts to their appropriate proportions. Underlying this ability is a pluripotent population of dividing cells called neoblasts, which are required for homeostatic …
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Activin signaling controls a wound-induced program essential for regenerative patterning
… what body part to regenerate. Planarians are flatworms that can regenerate any missing body part, and are studied to identify mechanisms underlying regeneration. At transverse amputation planes, a poorly understood mechanism specifies regeneration of either a head or a tail. This …
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Physiology and pharmacology of flatworm muscle
… (VOCCs), in both free-living and parasitic flatworms, has been difficult since the currents carried by these channels are small in amplitude and run down quickly. While the presence of VOCCs in the parasite Schistosoma mansoni has been evident from molecular data, they have escaped …
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Post-genomic studies on the neuropeptide signalling system of Juvenile <i>Fasciola hepatica</i>
… RNA-sequencing studies from a variety of flatworms were analysed in order to inform hypotheses on neuropeptide functions. These studies have also been used to identify muscle-specific G-Protein Coupled Receptors (GPCRs). These transcripts were taken forward into a larger-scale RNA …
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A zebrafish model to study the schistosome egg granuloma
Schistosomiasis is a disease caused by parasitic flatworms which reside within the venules of their human host. The disease pathology is caused by the eggs which they produce, and is primarily characterized by the granulomas which form around them. While the granulomas have pathological …
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Mechanisms of axial polarity modification during postembryonic development of the basal bilaterian Convolutriloba macropyga
<p>Acoel flatworms have varied modes of asexual reproduction that involve dramatic postembryonic modification of their anterior-posterior (AP) axis. The acoel species <em>Convolutriloba macropyga</em> reproduces through a reversed polarity budding process in which offspring develop from two …
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Characterizing neural tissues with mass spectrometry imaging via enhanced computational approaches
… of nervous system regeneration in planarian flatworms resulting in the discovery of two novel neuropeptides that may be involved in planarian regeneration. In addition, several bioinformatic tools are developed to predict final neuropeptide structures and associated masses that can be …
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Organizer regeneration and patterning of stem cell lineages in planarians
Planarians are freshwater flatworms capable of whole-body regeneration. Like development, regeneration requires the establishment of tissue patterns and the specification of appropriate cell types. However, regeneration has the additional challenges of performing these tasks in the absence of …
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STK25 and TAO Regulate Muscle-Specific Transcription and Muscle Function in the Parasitic Flatworm Schistosoma Mansoni
Schistosomiasis, a disease caused by parasitic flatworms called schistosomes, affects 240 million people in developing regions, including large parts of Africa, Asia, and South America. In some of these areas, the disease affects over 50% of the population, making Schistosomiasis second only to …
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