seminiferous tubules definition
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Seminiferous Tubules: Functions & Definition These cells include skin cells, blood cells, and any cell other than sex cells. Meiosis is the process that creates sex cells. These cells include sperm and egg cells. Seminiferous tubules are structures located in the male reproductive gland known as the testis. Meiosis in males occurs in the seminiferous tubules. This means that the seminiferous tubules are crucial in the process of reproduction. The seminiferous tubules consist of a network of tubes that are lined with a type of cell known as a sertoli cells. Sertoli cells are long columnar cells that are differentiated during the process of meiosis to form sperm.
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Proximal tubule Proximal tubule. The proximal tubule is the portion of the duct system of the nephron of the kidney which leads from Bowman's capsule to the loop of Henle. It is conventionally divided into the proximal convoluted tubule (PCT) and the proximal straight tubule (PST). 1 Structure 1.1 Brush border cell.
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seminiferous tubule seminiferous tubule in Medicine Expand. seminiferous tubule n. One of two or three twisted curved tubules in each lobule of the testis in which spermatogenesis occurs.
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Seminiferous Tubules: Functions & Definition Definition of Seminiferous Tubules. Male sex cells are known as sperm. When a sperm from a male unites with the egg from a female, the process of fertilization occurs and a new life in produced.This process of reproduction is crucial for the survival of any living thing.hese cells include skin cells, blood cells, and any cell other than sex cells. Meiosis is the process that creates sex cells. These cells include sperm and egg cells. Seminiferous tubules are structures located in the male sex organ called the testis.
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- This page provides all possible meanings and translations of the word seminiferous tubules. U.S. National Library of Medicine(0.00 / 0 votes)Rate this definition: The convoluted tubules in the TESTIS where sperm are produced (SPERMATOGENESIS) and conveyed to the RETE TESTIS.
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nephritis nephritis. inflammation of the kidney; a focal or diffuse proliferative or destructive disease that may involve the glomerulus, tubule, or interstitial renal tissue. Called also Bright's disease. The most usual form is glomerulonephritis, that is, inflammation of the glomeruli, which are clusters of renal capillaries.ubulointerstitial nephritis nephritis of the renal tubules and interstitial tissues, usually seen secondary to a drug sensitization, systemic infection, graft rejection, or autoimmune disease. Characteristics include lymphocytes in interstitial infiltrate and within tubules, mild hematuria, and pyuria.
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- Kidney (corpuscles and tubules) In contrast, the secretory units of the kidney, called renal corpuscles, comprise a relatively small proportion of the kidney. The bulk of the kidney consists of highly specialized tubules, which correspond to the duct tree of a typical gland.he initial segment of the tubule is the proximal convoluted tubule. It is called proximal because it is nearest to the starting point (the renal corpuscle) and convoluted because it twists about (in contrast to the straight segments of tubule which form the loop of Henle).
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Seminiferous tubule Seminiferous tubules are located within the testes, and are the specific location of meiosis, and the subsequent creation of male gametes, namely spermatozoa.he seminiferous tubules are formed from the testis cords that develop from the primitive gonadal cords, formed from the gonadal ridge. Seminiferous tubule (right) with sperm (black, tiny, ovoid).
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Seminiferous Tubules: Functions & Definition Meiosis in males occurs in the seminiferous tubules. This means that the seminiferous tubules are crucial in the process of reproduction. The seminiferous tubules are found inside the testes. They consist of a network of tubes that are lined with a type of cell known as a sertoli cells.his means that the seminiferous tubules are crucial in the process of reproduction. The seminiferous tubules are found inside the testes. They consist of a network of tubes that are lined with a type of cell known as a sertoli cells.
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- The. is a physical barrier between the blood vessels and the seminiferous tubules of the testes (the organs in which sperm originate). -BAYLOR COLLEGE OF MEDICINE-Small molecule may provide direction in ... by Travel Business Review (TBR).he. is a physical barrier between the blood vessels and the seminiferous tubules of the testes (the organs in which sperm originate). -BAYLOR COLLEGE OF MEDICINE-Small molecule may provide direction in ... by Travel Business Review (TBR).
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Malpighian tubule system The Malpighian tubule system is a type of excretory and osmoregulatory system found in some insects, myriapods, arachnids, and tardigrades.The system consists of branching tubules extending from the alimentary canal that absorbs solutes, water, and wastes from the surrounding hemolymph.The wastes then are released from the organism in the form of solid nitrogenous compounds. The system is named after Marcello Malpighi, a seventeenth-century anatomist.It is unclear as to whether the Malpighian tubules of arachnids and those of the Uniramia are homologous or the result of convergent evolution.he system is named after Marcello Malpighi, a seventeenth-century anatomist. It is unclear as to whether the Malpighian tubules of arachnids and those of the Uniramia are homologous or the result of convergent evolution.
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Shared Flashcard Set Distal Tubule-In the vertebrate kidney, the portion of a nephron that helps refine filtrate and empties it into a collecting duct. Collecting Duct-The location in the kidney where filtrate from renal tubules is collected; the filtrate is now called urine.Renal Pelvis-Funnel–shaped chamber that receives processed filtrate from the vertebrate kidney’s collecting ducts and is drained by the ureter.reter-A duct leading from the kidney to the urinary bladder. Urethra-A tube that releases urine from the body near the vagina in females and through the penis in males; also serves in males as the exit tube for the reproductive system.
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Seminoma Seminoma (also known as pure seminoma or classical seminoma) is a germ cell tumor of the testicle or, more rarely, the mediastinum or other extra-gonadal locations. It is a malignant neoplasm and is one of the most treatable and curable cancers, with a survival rate above 95% if discovered in early stages. Testicular seminoma originates in the germinal epithelium of the seminiferous tubules. About half of germ cell tumors of the testicles are seminomas.
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Urinary Casts Also known as: Hyaline casts, Granular casts, Renal tubular epithelial casts, Waxy casts, Casts in the urine, Fatty casts, Red blood cell casts or White blood cell casts. Definition. Urinary casts are tiny tube-shaped particles that can be found when urine is examined under the microscope during a test called urinalysis. Urinary casts may be made up of white blood cells, red blood cells, kidney cells, or substances such as protein or fat. The content of a cast can help tell your health care provider whether your kidney is healthy or abnormal. How the Test is Performed. The urine sample you provide may need to be from your first morning urine. The sample needs to be taken ...
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intercapillary glomerulosclerosis proteinuria and ultimately, renal failure occuring in long-standing diabetes, and characterized by rounded hyaline or laminated nodules in the periphery of the glomeruli with capillary basement membrane thickening, and increased mesangial matrix.Synonym(s): intercapillary glomerulosclerosis.
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Testes Each lobule contains 1 to 4 highly coiled seminiferous tubules that converge to form a single straight tubule, which leads into the rete testis. Short efferent ducts exit the testes. Interstitial cells (cells of Leydig), which produce male sex hormones, are located between the seminiferous tubules within a lobule.perm are produced by spermatogenesis within the seminiferous tubules. A transverse section of a seminiferous tubule shows that it is packed with cells in various stages of development. Interspersed with these cells, there are large cells that extend from the periphery of the tubule to the lumen.
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Shared Flashcard Set Term. Describe the structural and functional relationships between the nephron tubules and their associated blood vessels. Definition. Portions of the nephron that extend from the renal corpuscle to the collecting duct allow exchange between the tubule and the peritubular capillaries.The epithelial cells in different segments are structurally different. For example, the membranes have different permeabilities and contain different transporters.ortions of the nephron that extend from the renal corpuscle to the collecting duct allow exchange between the tubule and the peritubular capillaries. The epithelial cells in different segments are structurally different. For example, the membranes have different permeabilities and contain different transporters.
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Histology@ Yale Seminiferous Tubules. The human testicular parenchyma contains several important structures. Spermatozoa is produced in the germinal epithelium of the seminiferous tubules and released into the lumina of these ducts. The germinal lining contains both Sertoli cells and the developing spermatocytes.
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glomerulus 1. a small tuft or cluster, such as a small convoluted mass of capillaries. 2. a network of vascular tufts encased in the malpighian capsule of the kidney. adj., adj glomer´ular. The glomerulus is an integral part of the nephron, the basic unit of the kidney.Each nephron is capable of forming urine by itself, and each kidney has many nephrons. The specific function of each glomerulus is to bring blood (and the waste products it carries) to the nephron.he glomerulus is an integral part of the nephron, the basic unit of the kidney. Each nephron is capable of forming urine by itself, and each kidney has many nephrons. The specific function of each glomerulus is to bring blood (and the waste products it carries) to the nephron.
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ureter the fibromuscular tube, 41 to 46 cm long, through which the urine passes from the kidney to the bladder. adj., adj ure´teral, ureter´ic. As urine is produced by each kidney, it passes into the ureter, which, by contracting rhythmically, forces the urine along and empties it in spurts into the bladder.he fibromuscular tube through which the urine passes from the kidney to the bladder. ectopic ureter. an abnormally placed opening of the ureter, either into the urinary bladder or at another site in the lower urinary or genital tract. There is usually constant dribbling of urine and commonly an associated pyuria.
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- Definition of PROXIMAL CONVOLUTED TUBULE. : the convoluted portion of the vertebrate nephron that lies between Bowman's capsule and the loop of Henle and functions especially in the resorption of sugar, sodium and chloride ions, and water from the glomerular filtrate —called also proximal tubule.ADVERTISEMENT. the convoluted portion of the vertebrate nephron that lies between Bowman's capsule and the loop of Henle and functions especially in the resorption of sugar, sodium and chloride ions, and water from the glomerular filtrate —called also proximal tubule. ADVERTISEMENT.
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renal tubule Henle's t's the straight ascending and descending portions of a renal tubule forming Henle's loop. lactiferous t's galactophorous tubules. mesonephric t's the tubules comprising the mesonephros, or temporary kidney, of amniotes. metanephric t's the tubules comprising the permanent kidney of amniotes.enle's t's the straight ascending and descending portions of a renal tubule forming Henle's loop. lactiferous t's galactophorous tubules. mesonephric t's the tubules comprising the mesonephros, or temporary kidney, of amniotes. metanephric t's the tubules comprising the permanent kidney of amniotes.
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glomerulus renal glomerulus. a small convoluted mass of capillaries, a network of vascular tufts, encased in the malpighian or Bowman's capsule. The glomerulus is an integral part of the nephron, the basic unit of the kidney. Each nephron is capable of forming urine by itself, and each kidney has many nephrons.The specific function of each glomerulus is to bring blood (and the waste products it carries) to the nephron.he glomerulus is an integral part of the nephron, the basic unit of the kidney. Each nephron is capable of forming urine by itself, and each kidney has many nephrons. The specific function of each glomerulus is to bring blood (and the waste products it carries) to the nephron.
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Alternative names Sperm are produced in the seminiferous tubules of the testes. There are about 700 of these tubes in each testis, each is the length of an arm and the width of a few hairs; the whole collection of tubules is longer than a football pitch!
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Diabetes insipidus - nephrogenic Diabetes insipidus-nephrogenic. Nephrogenic diabetes insipidus is a disorder in which a defect in the small tubes (tubules) in the kidneys causes a person to pass a large amount of urine and lose too much water. Normally, the kidney tubules allow most water to be removed and returned to the blood.
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- Kidney Anatomy. The kidneys are bean-shaped organs that lie retroperitoneal in the superior lumbar region. The medial surface is concave and has a renal hilus that leads into a renal sinus, where the blood vessels, nerves, and lymphatics lie.assive tubular reabsorption is the passive reabsorption of negatively charged ions that travel along an electrical gradient created by the active reabsorption of Na+. Obligatory water reabsorption occurs in water-permeable regions of the tubules in response to the osmotic gradients created by active transport of Na+.