Zoology Sciences - EurekaMag.com
Mannheim, Germany (PRWEB) February 24, 2012
The Zoology Sciences Magazine EurekaMag.com publishes insights into subjects in all areas of natural sciences including biology, agriculture, horticulture, forestry, geography, environment and health. Drawing from this pool of scientific disciplines, it provides articles, reviews and insights on natural sciences topics. While the Zoology Sciences Research Category contains over 36 million references, most of the insights are included in the Zoology Sciences Keyword Category of the online magazine. The latter category now includes three newly published insights into Blue Glaucus, Limbic System and Metamorphorsis.
The EurekaMag.com insight into Blue Glaucus covers the species Glaucus atlanticus which is a small-sized blue sea slug, a pelagic aeolid nudibranch, a marine gastropod mollusk. The EurekaMag.com insight covers the only species in the genus Glaucus, which is, however, closely related to Glaucilla marginata, another member of the family Glaucidae. The normal size of this species is up to three centimeters. It is silvery grey on its dorsal side and dark and pale blue ventrally. While it has dark blue stripes along the edge of its foot, it has a tapering body which is flattened and has six appendages which branch out into rayed cerata. Its radular teeth bear serrated teeth on their blades. Blue Glaucus is pelagic, and is distributed throughout the world's oceans, in temperate and tropical waters. Regions where this slug is found include the East and South Coast of South Africa, European waters, the east coast of Australia and Mozambique. This species floats upside down on the surface tension of the ocean. Blue Glaucus preys on other, larger pelagic organisms including the dangerously venomous Physalia physalis, Velella velella, Porpita porpita and Janthina janthina. Occasionally, individual Glaucus become cannibals.
EurekaMag.com presents an insight into the Limbic System which covers this set of brain structures including the hippocampus, amygdala, anterior thalamic nuclei, septum, limbic cortex and fornix, which support several functions including emotion, behavior, long term memory, and olfaction. The limbic system of the brain receives input from the olfactory pathways and sends efferants to the hypothalamus and the mesolimbic dopaminergic pathway. Chemical, biologic, and psychological stimuli can initiate and elicit sensitization. In turn, subsequent activation of the sensitized limbic and mesolimbic pathways can facilitate dysregulation of behavioral, autonomic, endocrine, and immune system functions. One study corroborates that slowing of the deeper structures of the limbic system is associated with affect. It also supports the neurobiological model that the right forebrain is associated with sympathetic activity and the left forebrain with the effective management of energy. Patients with major depression show structural abnormalities in the limbic system.
Metamorphorsis is a biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation. Several insects, amphibians, mollusks, crustaceans, Cnidarians, echinoderms and tunicates undergo metamorphosis, which is usually accompanied by a change of habitat or behavior. The Eurekamag.com insight into Metamorphosis includes a detailed description of a metamorphosis process during which the follicular epithelium became slightly pseudostratified and occasional extruded nuclei were found within the lumen. Secretory products were not found in these ductless bodies until climactic metamorphorsis, at which time mucoproteins and acid mucopolysaccharides were detectable. Parafollicular cells were present only during climactic metamorphosis and appeared to contribute to the formation of the follicular epithelia. Extruded nuclei and secretions similar to those of goblet cells indicated a holocrine activity. The epithelia of the ultimobranchial bodies acquired basement membranes, became pseudostratified and vascularization was pronounced during climactic metamorphosis, indicating a possible unknown endocrine activity.
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