3: Embryology Flashcards Preview

Renal Week 1 2017/18 > 3: Embryology > Flashcards

Flashcards in 3: Embryology Deck (29)
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1

What germ layer do the kidneys originate from?

Mesoderm

2

Which particular part of the mesoderm do the kidneys develop from?

Intermediate mesoderm

3

What structure do the kidneys originate from?

Pronephros

4

The pronephros develops into which structure?

Mesonephros

5

How does the pronephros descend into its correct position for development?

Mesonephric duct

6

What does the mesonephros develop into, forming the permanent kidney?

Metanephros

7

Which embryological structures do the metanephros develop from?

Ureteric bud

Metanephric blastema

8

What duct does the ureteric bud come from?

Mesonephric duct

9

What is the other origin of the kidneys apart from the ureteric bud?

Which germ layer does it come from?

Metanephric blastema

Intermediate mesoderm in the sacrum

10

The ___ ___ pushes into the ___ ___.

(ureteric bud, metanephric blastema)

ureteric bud pushes into the metanephric blastema

11

What happens when the ureteric bud fails to push into the metanephric blastema?

Kidney agenesis

Lack of a kidney

12

What structures of the kidney does the ureteric bud develop into?

Collecting system

so the collecting ducts all the way to the ureters

13

What embryological origin of the kidney forms the nephrons themselves?

Metanephric blastema

14

What embryological structures form the

a) collecting system

b) nephrons

of the kidney?

a) Ureteric bud

b) Metanephric blastema

15

Which body cavity do the kidneys originate in?

What do they need to do after that?

Pelvic cavity

Ascend to the retroperitoneal space of the abdomen

16

After they've ascended, are the kidneys intraperitoneal or retroperitoneal?

retroperitoneal

17

As the kidneys ascend from the pelvis to the abdomen, which blood vessel do they draw a supply from?

Abdominal aorta

18

As the kidneys rise, the vessels they draw blood from degenerate. What happens when this doesn't occur?

Accessory renal arteries

19

What can happen if one or both kidneys fail to ascend?

Pelvic kidney

Remains in the pelvis

20

What is a horseshoe kidney?

Metanephrons (pre-kidneys) FUSE at inferior poles, make a weird horseshoe shape and are more inferior than normal

21

What is the cloaca?

Early hindgut with ONE opening for the GI, renal and reproductive tracts

22

What germ layer does the cloaca originate from?

Endoderm

23

In which space do the bladder, urethra and rectum develop?

Primitive urogenital sinus

24

What is the difference between the primitive and definitive urogenital sinuses?

Primitive urogenital sinus forms earlier and has openings for GI, renal and repro tracts

Definitive urogenitial sinus separates from anorectal canal and has urethra and bladder only

25

What does the definitive urogenital sinus develop into?

Urethra and bladder

26

How do the mesonephric ducts factor in to the development of the bladder?

Form the posterior wall, which becomes the trigone

27

What structure, found superior to the bladder, exits in the umbilical cord to drain the bladder of the fetus?

Allantois

28

What does the allantois develop into in adults?

Urachus

closed off space

29

Problems with the ___ can cause bladder defects in newborns.

urachus