Embryology

Question 1

From what germ layer does the renal system develop from?

Answer 1

Intermediate mesoderm

Question 2

What is does the cloaca develop into?

Answer 2

It divides to form the rectum and anteriorly forms the urogenital sinus

Question 3

What adult organ structures arise from the cloaca?

Answer 3

urinary Bladder

Urethra

Question 4

At what week does the kidneys start to develop and what is their embryological term?

Answer 4

Metanephros start to develop at week 5

Question 5

At what week do the kidneys start to dunction?

Answer 5

Week 9

Question 6

From what embryonic structure does the kdineys develop from?

Answer 6

Ureteric bud (that develops off the mesonephric duct)

Question 7

What happens to the mesonephros after it degenerates?

Answer 7

Incoporated into the developing gonads

Question 8

What does the stalk and the cranial end of the ureteric bud develop into?

Answer 8

Stalk = ureter

Cranial end = renal pelvis

Question 9

What is the difference in the embyrological origin of the nephron and collecting ducts?

Answer 9

Nephron develops form metanephric mesoderm

Collecting duct develops form uteretic bud (which arises from mesonephros duct)

Question 10

When does the ascent of the kidneys finsih?

Answer 10

When they come in contact with the adrenal glands

Question 11

Where does the ureteric bud arise from and what does this eventual form in the adult?

Answer 11

the mesonephros in the trunk region has a duct which drains into the cloaca
The ureteric bud grows out from the caudal end of the mesonephric duct

• the ureteric bud forms the renal pelvis, calcyces and collecting duct