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28 Cards in this Set
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- Back
|
composed of a cupshaped
portion of the renal tubule |
Bowman’s/Glomerular Capsule
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specialized capillary bed
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Glomerular Capillaries
|
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initial site of urine formation, where the filtration of
blood occurs |
Glomerulus
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glomerular capillaries receive blood from the _____ and drain into the _____ instead of a venule
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Afferent Arteriole, Efferent Arteriole
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funnel-shaped structure that picks up fluid from the glomerular capillaries and leads into the renal tubule
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Nephrostome
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glomerular capillaries are suspended in the coelom by peritoneal folds and discharge their filtrate directly into the coelomic fluid which is then picked up by a nephrostome
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External Glomerulus
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glomerular capillaries
are ensheathed by Bowman’s capsule. |
Internal Glomerulus
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outer layer of the Bowman's capsule and consists
of a simple squamous epithelium |
Parietal Layer
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space between the inner and outer layer of the Bowman's capsule where the initial
stage urine accumulates after filtration |
Capsular or Urinary Space
|
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inner layer of teh Bowman's capsule with specialized epithelium in intimate
contact with the glomerular capillaries |
Visceral Layer
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specialized cells in the Bowman's capsule that contain numerous foot like processes that wrap around the glomerular capillaries and form one more component of the filtration membrane.
|
Podocytes
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During development the renal tubules differentiate from a pair of ribbons of
embryonic mesoderm called |
Intermediate or Nephrogenic Mesoderm.
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|
Due to their origin (against the mesodermal somites which give rise to the back muscles) the kidneys are located _____
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retroperitoneal
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the functional unit of the vertebrate kidney; defined as a renal tubule and its associated blood vessels
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nephron
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the first step in urine formation and occurs in the renal corpuscle
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Filtration
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the result of the filtration step of urine formation is known as
|
Glomerular Filtrate
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the recovery of elements of filtered material from the glomerular filtrate by the blood during uring formation; Material is moving from the renal tubule into the blood
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Tubular Resorption
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the dumping of more waste substances into the glomerular filtrate from the blood during urine formation; Material is moving into the renal tubule from the blood
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Tubular Excretion
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the term for the hypothetical ancestral vertebrate kidney
|
Archinephros
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have a transient series of segmental external glomeruli, nephrostomes, and tubules formed throughout most of the nephrogenic mesoderm; found in hagfish; closest thing to archinephros
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Holonephros
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The larval hagfish holonephros will develop into a ______ kidney during development.
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Mesonephric
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the portion of nephrogenic mesoderm at the cranial aspect of the nephrogenic ribbon where the first pronephric tubules arise
|
pronephros
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the human embryo has ___ pairs of pronephric tubules
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7
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The distal portions of the first few pronephric tubules will unite to form a pair of caudally directed ducts which will grow to the cloaca. These ducts are the right and left
|
Pronephric Ducts
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two pronephric ducts and the pronephric tubules make
up what is termed the ____ Kidneys |
Pronephric
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The right and left pronephric ducts will have an inductive
effect on the nephrogenic mesoderm causing the formation of a new set of urinary tubules, the _____ |
Mesenephric Tubules
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With the regression of the pronephric kidney and the
development of the mesenephric tubules the pronephric duct will become the _____ |
Mesenephric Duct
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The mesenephric tubules and mesenephric ducts make up the
_____ Kidneys. |
Mesenephric
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