blood in the semen. ADVERTISEMENTS: 3. In biology, tissue is a biological organizational level between cells and a complete organ.A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. 1) veliger larva anus posterior, no mantle cavity 2) shell rotates to adult position viscera rotates 90 degrees, mantle cavity visible3) anus and mantle continue to rotate, mantle cavity expands 4) anus rotated 180 degrees, mantle epithelium reorganizes to enlarge cavity 5) anus and mantle cavity anterior, animals head and be withdrawn into In zoology, torsion is a physiological process that occurs in gastropod organisms. Testicular torsion (TT) is common surgical emergency that requires early diagnosis and immediate intervention within 6 h since its onset to salvage the testis. Group 3 (torsion/detorsion with rosuvastatin treat- ment) (n = 8) Same procedures in group 2 were Materials and methods repeated in this group, but 10 mg/kg rosuvastatin was injected intraperitoneally 30 min before detorsion. Testicular torsion-detorsion syndrome has increasingly been reported in the literature. In zoology, torsion is a physiological process that occurs in gastropod organisms. Manual detorsion should be avoided if more than 6 hours have passed since the onset of testicular torsion. Name three different species of Schistosoma and name the organ where each of them will be found in the human being. There are other potential causes of severe testicular pain, such as the inflammatory condition epididymitis. In some groups of gastropods (Opisthobranchia) there is a degree of Typical features of ovarian torsion are present on the initial scan - diffuse ovarian edema and a "whirlpool" appearance of the adnexal vessels. Patients with chronic testicular pain were once referred early to urologists but are now being seen and successfully treated in primary. This rotation brings the mantle cavity and the anus to an anterior position above the head. (See 'Pediatric patients' above and 'Prior ovarian torsion' above.) Isolated unilateral torsion of a fallopian tube is an infrequent but significant cause of acute lower abdominal pain in a female of reproductive age. Some species reverse torsion ("detorsion"), but evidence of having passed through a twisted phase can be seen in the anatomy of these forms. Testicular torsion is a time-dependent diagnosis, a true urologic emergency, and early evaluation can assist in urologic intervention to prevent testicular loss. Testicular torsion-detorsion syndrome or intermittent testicular torsion refers to acute and periodic testicular pain due to limited blood flow, integrated with asymptomatic periods 1. Example: Acmaea. Organs are then formed by the functional grouping together of multiple tissues. Introduction. Torsion (gastropod) Look up torsion in Wiktionary, the free dictionary. Torsion is a gastropod synapomorphy which occurs in all gastropods during larval development. Torsion is the rotation of the visceral mass, mantle, and shell 180 with respect to the head and foot of the gastropod. Museum of Zoology, and Information and Technology Services. Major evolutionary feats: Coelom, circulatory system (open except in annelids), respiratory organs, more advanced excretory system - Metanephiridia (kidneys), more advanced nervous system/sensory organs. Course: B.Sc. Plus supportive care. Torsion is a surgical emergency! 180 rotation by muscle contraction alone. Most torsions occur due to medial twisting. Testicular torsion occurs when a testicle rotates and twists the spermatic cord, which is a cord-like structure containing blood vessels, nerves, and ducts that run to and from the testes. In this case, it was easy to diagnose torsion-detorsion syndrome as the detorsion occurs luckily at the same ultrasound study that is an uncommon occurance. Clinical examination revealed tenderness in right lower abdomen and If urology is not available immediately, manual detorsion should be attempted. What is testicular torsion? The testicle can survive for only about six to eight hours without any blood flowing to it. Detorsion is the opposite of torsion in zoology, which is the process of a gastropod rearranging its body and organs to accommodate the presence of a shell. How to use torsion in a sentence. What makes this presentation of disease reportable? Overview. Testicular torsion blocks the blood vessels to one testicle. ), - Complete detorsion, - typical Opisthobranchia (Aplysia) Detorsion In extreme cases, as in Pterotrachea, body elongates to become wormlike. In the context of patient's symptoms concurrently improving this may well represent a degree of hyperemia following de-torsion. As a result of detorsion the pallial complex travels towards the posterior end along the right side. When this happens, little or no blood is able to flow to that area. 2. Testicular torsion is a surgical emergency and manual testicular detorsion, when performed correctly, is a testis-saving bedside therapeutic. Zoology : University/board: Assam University: NTS-09/ ZOOH-2 /026 2009 What is torsion and detorsion? Recently, indocyanine green (ICG) has become an excellent tool to identify biliary and vascular Testicular torsion is the twisting of the tube, called the spermatic cord, which leads to the testicle. This cuts off the blood supply to the ovary, which if not treated promptly, can cause tissue in the organ to die. Rotation by differential growth alone. Torsion is the rotation of the visceral mass, mantle, and shell 180 with respect to the head and foot of the gastropod. Partial testicular torsion with torsion-detorsion syndrome is a real clinical and imaging dilemma. Torsion is a gastropod synapomorphy which occurs in all gastropods during larval development. Le Global Index Medicus (GIM) fournit un accs mondial la littrature biomdicale et de sant publique produite par et dans les pays revenu intermdiaire faible. Torsion is a process in larval gastropods whereby the visceropallium is rotated anti- clockwise through 180 from its initial position on the head-foot complex. Zoology TDC Part-I Zoology Honours --- Second Paper Question paper. Torsion can be brought about in the following ways: 1. Testicular torsion is a surgical emergency. Testicular torsion occurs when a testicle rotates and twists the spermatic cord, which is a cord-like structure containing blood vessels, nerves, and ducts that run to and from the testes. If unsuccessful, further manual detorsion may be attempted as the testicle can twist 180 degrees. Tucking is a technique whereby an individual hides the crotch bulge of the penis and testicles so that they are not conspicuous through clothing. Relationship with other disciplines; History, economics, sociology, psychology, political science, zoology, medical science Main branches of anthropology, their scope, and relevance: (a) Social cultural anthropology, (b) physical and biological anthropology, (c) archaeological anthropology Testicular torsion (TT) is a true urologic emergency and must be differentiated from other causes of acute testicular pain because a delay in diagnosis and management can lead to loss of the testis and infertility. Case Discussion. Detorsion is reversal of torsion which takes place when during evolution shell is lost or a type of shell evolves that has openings on the opposite sides. dizziness. As the shell develops, the body of the gastropod, often a snail, must undergo a This occurs in about one in every 4,000 males. Plus supportive care. 4 Manual detorsion is as easy (or as difficult) as opening a book. What is testicular torsion? 2nd line manual detorsion followed by scrotal exploration. vomiting. In some cases, the torsion might be manually corrected during initial examination, before any diagnostic imaging. Testicular torsion is a disease caused due to the rotating and twisting of the spermatic cord that provides blood flow to the testicle. Torsion (gastropod) In some groups of gastropods ( Opisthobranchia) there is a degree of secondary detorsion or rotation towards the original position; this may be only partial detorsion or full detorsion. The torsion or twisting of the visceral mass of larval gastropods is not the same thing as the spiral coiling of the shell, detorsion when the changes occurred during torsion are reversed, it is called detorsion this causes straightening of the nerves and the group in which it occurs is called euthyneura because of this detorsion, the pallial complex goes back to the posterior end, the auricle occupies the place behind the ventricle and the visceral loop 1,4 Diagnosis of Torsion is the rotation of the visceral mass, mantle, and shell 180 with respect to the head and foot of the gastropod. If not, the hyperemic status of the involved testis and epididymis is typically similar to epididymo-orchitis Adjunct prosthetic device. So that the mantle cavity, with its pallial complex, is brought to the front of the body in the adult. Many snails have an operculum, a horny plate that seals the opening when the snail's body is drawn into the shell. Detorsion without oophoropexy (but with cyst drainage or cystectomy) is performed when a mass is present. This outpatient procedure allows the patient to walk in, undergo the procedure which lasts less than an hour, and then walk out the same day. In some groups of gastropods there is a degree of secondary detorsion or Torsion of other structures Isolated torsion of the fallopian tube is uncommon but may also occur and result in an adverse impact on tubal function . 4. Incomplete detorsion - Opisthobranchia and Pulmonata (Acteon, Bulla, etc. Detorsion is reversal of torsion which takes place when during evolution shell is lost or a type of shell evolves that has openings on the opposite sides. In such situations twisting of visceral mass is not necessary. Hence, detorsion takes place during the larval stage and the animal again becomes bilaterally symmetrical. nausea. lumps in the scrotal sac. This rotation brings the mantle cavity and the anus to an anterior position above the head.. In some forms the changes brought about by torsion are reversed to a certain extent, while in others, e.g., Aplysia a complete reversal of torsion takes place which is known as detorsion, this occurs when the shell is lost or much reduced, the ctenidia liberated from their enclosing case point posteriorly again, their anterior position being of no advantage, and the visceral hump As the shell develops, the body of the gastropod, often a snail, must undergo a This condition is a surgical emergency. Detorsion: Acquisition of secondary symmetry observed in some Opisthobranch Gastropod is regarded as the result of detorsion. The original mechanism by which torsion was brought about was probably the contraction of larval retractor muscles, the entire rotation being completed in a few minutes. Examples: Patella, Haliotes, etc. Increased surface area, storage, elimination of wastes, hydrostatic support, facilitates increased body size, small in molluscs. However, testicular torsion is a rare condition. An uncommon but serious condition called ovarian torsion (also known as adnexal torsion) occurs when the ovary, and sometimes the fallopian tube, twist on the tissues that support them. Basic body plan: The English word "tissue" derives from the French word "tissu", the past In such situations twisting of visceral mass is not necessary. Sometimes, our insides literally tie themselves in knots. 2009 Assam University B.Sc. There is however definite and quite pronounced ovarian vascularity. Detorsion is Manual Detorsion. 2. 2+2+6+4 = 14. Hence, detorsion takes place during the larval stage and the animal again becomes bilaterally symmetrical. TORSION AND DETORSION IN MOLLUSCA. Torsion is a process in which the viscero-pallium rotates anti-clockwise through 180 from its initial position during larval development. So that the mantle cavity, with its pallial complex, is brought to the front of the body in the adult.
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what is torsion and detorsion in zoology