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20 Cards in this Set
- Front
- Back
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what developmental layer does most of the UG systeme derive from?
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Intermediat mesoderm;
extends from cervical to sacral regions |
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what are the three diff kidney systems formed in intrauterine life? which ones fxn?
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prenephros, mesonephros, metanephros
meso and meta are functional |
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what is the significance of the pronephros?
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the nephrotomes form a pronephric tubel then forms pronepheric duct which is later taken over by meso
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nephrogenic cord
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unsegmented intermediate mesoderm that develops in to mesonephros, which is a fxnal kidney
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when does metanephros form?
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9 weeks till term
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from what two basic primordia does the metanephros form?
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ureteric bud: meta nephric diverticulum; forms the collecting system
meta nephric mass (blastema) caudal most part of int. mesoderm, forms a cap over the uteteric bud; excretory units (glom, BC, pCT, DCT) |
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what is reciprocal induction?
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ther ureteric bud and metanephric blastema incude each other to differentiate
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what happens to the kidneys between weeks 6-9?
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ascent into thoracic cavity and medial rotation
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do ectopic ureters cause incontinence in males?
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no because it enters either prostatic urethra, ejac duct, vas def or seminal vesidle; always superior to the external urethral sphincter
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what does the cloaca receive?
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opeings of : hindugyt, genital ducts, ureters
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what is the ureorectal septum?
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mesoderm that divides ug sinus from anal rectal cannal
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what are four derivatives of UG sinus in males?
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lining or bladder
linning of urethra outgrowths of urthra: prostate, bulbourethral glands prostatic utricle |
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what is the spongy urethra derived from?
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most dervied from endoderm of UG sinus
but navicular fossa from surface ectoderm |
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what are 5 derviatives of UG sinus in females?
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lining of bladder
entire lining of urethra vagina endoermal outgrowths: greater vesitubular and paraurethral glands vestibule of vagina |
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what eventually forms the trigone?
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mesonephric duct
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what happens if an allantosis persists?
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you can pee through your belly button
urachus |
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what determins sex dimorphism?
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SRY gene; w/o it female
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from what three sources do gonads develop?
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body cavity (coelomic)
underlying mesenchyme primordial germs cells- give rise to ova or spermatagonia |
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where do the primitive sex cords come from?
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coelomic epi
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where do you find the Intersitial cells of leydig? what do they produce? where are they derived
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between seminiferous tubule
produce testosterone diff from underlying mesenchyme |
