Development of the Kidney Flashcards

1
Q

There are three sets of kidneys that develop through gestation. Give their names and times.

A

Pronephros: 3 - 4 weeks
Mesonephros: 4 weeks to 2 months
Metanephros: 5 weeks to maturity

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2
Q

When do the first metanephrons become functional?

A

2.5 months

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3
Q

The mesonephric duct is also called the __________.

A

Wolffian duct

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4
Q

The mesonephric duct eventually becomes the _____________.

A

epididymus and ductus deferens in males, nothing in females

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5
Q

The nephrotomes __________ and become the mesonephric duct.

A

vesiculate

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6
Q

The mesonephric duct develops caudally and joins the _____________.

A

cloaca

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7
Q

The vesicular nodules of the pronephros disappear by __________.

A

week 4

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8
Q

The Mullerian duct is also called the __________.

A

paramesonephric duct, because it runs just alongside the mesonephric duct

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9
Q

The ________ also joins the cloaca.

A

Mullerian duct

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10
Q

From what does the Mullerian duct develop?

A

An invagination of the coelom wall

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11
Q

The kidneys develop from ______________.

A

ureteric buds surrounded by metanephric blastemas

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12
Q

Where do the ureteric buds originate?

A

On portions of tissue on the mesonephric duct near where it attaches to the cloaca

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13
Q

The tissue from the __________ goes on to form the calyces and collecting ducts.

A

ureteric buds

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14
Q

The cloaca is the confluence of the _____________.

A

hindgut and nephric ducts

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15
Q

The tubular epithelium does not develop from the ___________.

A

ureteric bud; it develops from mesoderm near the ureteric bud called the metanephric spheroid

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16
Q

The nephrogenic cord is a tube that ___________ bud off from.

A

nephrotomes (which fuse to become the pronephros and mesonephros)

17
Q

The ureteric bud ultimately becomes the __________.

A

renal pelvis

18
Q

Where do the ureteric buds originate?

A

From the mesonephric duct

19
Q

When does the urogenital sinus separate from the hindgut?

A

Approximately 6-7 weeks