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Renal Embryo Flashcards

(48 cards)

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1
Q

What is the order of the development of the nephric structures?

A
  1. ) urogenital ridge
  2. ) Nephrogenic cord
  3. ) Pronephros
  4. ) Mesonephros
  5. ) Metanephros
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2
Q

When do the pronephros appear? Where are they located?

A

Early 4th week. In the cervical region

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3
Q

What do the pronephric ducts run into?

A

The cloaca

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4
Q

When do the pronephros degenerate?

A

Day 24-25

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5
Q

What part of the pronephros persist and are used by the mesonephros?

A

The pronephric ducts

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6
Q

What do the pronephros initiate that is important for the formation of the kidney?

A

They initiate a cascade of development

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7
Q

When do the mesonephros appear? Where?

A

Late 4th week. Caudal to the pronephros

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8
Q

What two important structures do the mesonephros contain? Which forms first?

A

The mesonephric duct and the mesonephric tubules. The ducts form first

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9
Q

What is the function of the mesonephric duct?

A

Induce the formation of the mesonephric tubules from the surrounding intermediate mesoderm

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10
Q

What do the mesonephric tubules form?

A

The renal corpuscles

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11
Q

What is the medial end of the mesonephric tubule called?

A

The glomerular capsule

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12
Q

What is the function of mesonephros? Does it produce urine?

A

Function as a kidney from week 6-10. Produces a small amount of urine

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13
Q

When does the mesonephros stop functioning?

A

Week 10

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14
Q

What is special about the mesopnephros in males?

A

Forms efferent ductules (sperm release)

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15
Q

When will the mesonephros degenerate by?

A

Week 12

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16
Q

When does the metanephros arise?

A

Week 5

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17
Q

What does the caudal end of each mesonephric duct induce?

A

The ureteric bud

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18
Q

What two structures make up the metanephros?

A
  1. ) Ureteric bud

2. ) Metanephric blastema

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19
Q

What is the ureteric bud an outgrowth of?

A

The mesonephric duct

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20
Q

What is the metanephric blastema formed from?

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A

The nephrogenic cord

21
Q

What does the metanephros form? When?

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A

The functional kidney by the 9th-10th week

22
Q

The ureteric bud penetrates the blastema to form what?

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A

The renal pelvis

23
Q

The stalk of the ureteric bud becomes what?

24
Q

The cranial portion of the ureteric bud becomes what?

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A

Collecting tubules

25
What are the first generation of the collecting tubules called?
The major calices (4)
26
What are the second generation of the collecting tubules called?
The minor calices (4)
27
The metanephric vesicles form from what?
The metanephrogenic blastema
28
The metanephric vesicles will elongate to form what?
The metanephric tubules
29
What does the proximal end of the metanephric tubules become?
The glomerular capsule
30
What does the distal end of the metanephric tubule become?
The PCT, DCT, and nephron loop
31
First branch of renal blood supply form from?
Common iliacs
32
Definitive renal arteries are from?
Abdominal aorta
33
What is the urogenital sinus critical for?
Formation of the urinary bladder and urethra
34
What does the vesicle part of the urogenital sinus form?
Most of the urinary bladder
35
What does the pelvic part of the urogenital sinus form?
- neck of bladder - prostatic urethra (m) - urethra (f)
36
What does the phallic part of the urogenital sinus form?
- spongy urethra (m) | - lining of the vaginal vestibule (f)
37
What is the trigone?
The triangular region of the mesonephric and ureteric ducts blending into the posterior bladder
38
What does the bladder develop from?
The vesicle part of the urogenital sinus
39
What is the bladder continuous with?
The allantois
40
The allantois constricts and forms what?
The urachus
41
The allantois extends from the apex of the bladder to the?
Umbillicus
42
What will the urachus form?
The median umbilical ligament
43
What is a urachal sinus?
One end of the urachus remains open into the bladder or umbilicus
44
What is a urachal fistula?
Entire urachus remains patent and allows urine to escape from umbilical orifice
45
What does the intermediate mesoderm form?
the urinary system and part of the genital system
46
What is a renal corpuscle?
The glomerulus and Bowmans capsule
47
Incomplete division of the kidney
divided kidney and bifid ureter
48
Complete division of the kidney
double kidney and bifid ureter or separate ureters

Renal (6 decks)

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