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Embryology > Urinary > Flashcards

Urinary Flashcards

1
Q

what gives rise to the urogenital system

A

mesoderm - intermediate plate mesoderm

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2
Q

what is the terminal section of the handgun

A

allantois and the cloaca

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3
Q

what separates the allantois and cloaca

A

urorectal septum - mesoderm

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4
Q

from which of the three layers does the cloaca and gut tube originate from

A

endoderm

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5
Q

what happens to the allantois

A

extends into the umbilical cord and when cut it becomes obliterated and fibrous

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6
Q

what is the first set of kidneys to develop

A

pronephros

develop from the intermediate mesoderm in the neck

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7
Q

what are the components of the pronephros

A

pronephric duct and rudimentary pronephric tubules

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8
Q

what happens to the pronephros

A

they degenerate in the 5th week however the duct remains

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9
Q

what is the second set of kidneys

A

mesonephros

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10
Q

what are the components of the mesonephros

A

mesonephric duct - from the pronephric duct

mesonephric tubules

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11
Q

what are the definitive kidneys

A

metanephros

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12
Q

what do the definitive kidneys consist off

A

small ureteric bud that comes off the metonephric duct

tubules

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13
Q

what happens to the mesonephric duct and tubules

A

recyled and used in the formation of the repro system
mesonephric tubules- rete testis or ovaries
duct- vas deferens or degenerates in females

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14
Q

what happens to the metanephric ureteric bud

A

undergoes repeated branching at the distal end

this becomes the calyces and renal pelvis etc

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15
Q

what occurs to the metanephric mesoderm

A

reciprocally induces itself with the ureteric bud

therefore it develops into tubules and blood vessels go and invaginate the tubules to form the glomerulus and nephron

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16
Q

do the kidneys ascend

A

begin in the pelvis region and dont ascend but the lower limb grows therefore they appear to ascend

17
Q

what happens to the blood supply of the kidneys as they ascend

A

it degenerates and then reforms

18
Q

what is the final stage of kidney development

A

they rotate so the hilum faces medially

19
Q

at what spinal level do they kidneys lie

A

T12-L3

Embryology (2 decks)

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