7-B Development of the Urinary Sytem

Question 1

T/F A child born with a variant in the urinary system has an increased chance of a variance int eh reproductive system.

Answer 1

True

Question 2

Name the 4 primordial that will make up the urogenital system

Answer 2

intermediated column of mesoderm (urogenital ridge); cloaca (terminal portion of hind gut, genital swellings and germ cells (from the yolk cells)

Question 3

What becomes of the urogenital ridge?

Answer 3

gonad and duct system, kidneys and part of the duct system

Question 4

What becomes of the cloaca?

Answer 4

bladder and portion of the urethra as well as the rectum

Question 5

What becomes of the genital swellings

Answer 5

external genitaila

Question 6

What type of tissue does the intermediate mesoderm differentiate from?

Answer 6

intermediate mesoderm (runs along length of the embryo)

Question 7

The urogenital ridges are __________ (relative location) and form a bulge on either side of the gut tube, with its dorsal mesentery.

Answer 7

retroperitoneal

Question 8

Name the two ducts that come from the urogenital ridge.

Answer 8

mesonephric duct (ends into the cloaca) and the paramesonephric duct (ends blindly behind the cloaca)

Question 9

What is the cloaca?

Answer 9

a dilated terminal portion of the hid gut, abuts against the cloacal membrane (mesonephric duct empties into the cloaca)

Question 10

Name 3 portions of the genital swellings as they develop.

Answer 10

genital tubercle, laboscrotal folds, urogential folds

Question 11

Name the embryonic tissue that becomes the collecting system v. the nephron (primordia of the kidney)

Answer 11

urteric bud vs the metanephros

Question 12

What is the projection of the cloaca into the umbilicus called?

Answer 12

allantois

Question 13

What partitions the cloaca into urinary and digestive tracts?

Answer 13

the urorectal septum

Question 14

What do the peramesonephric ducts form?

Answer 14

the uterus and part of the vagina

Question 15

Where does the metanephros grow from?

Answer 15

tissue at the inferior end of the urogenital ridge, it forms the urine producing components of the kidney

Question 16

Differentiation of the adult kidney begins with what?

Answer 16

interaction of the ureteric bud and metanephros, the interaction causes splitting of the mesoenphric duct

Question 17

The ureteric bud aries from what tissue and will eventually develop into what tissue?

Answer 17

arises from the mesonephric duct and will become the ureter

Question 18

How does the ureteric bud become separate from the mesonephric duct?

Answer 18

due to bladder differential growth the two tubes divide

Question 19

What do we call the vestige of the mesonephric ducts in adults?

Answer 19

trigone of the bladder

Question 20

Kidney’s ascend to where in the abdomen?

Answer 20

T12- L3

Question 21

How does the arterial supply to the kidney develop as the kidney ascends

Answer 21

kidney’s do not drag their vasculature with them, they instead form multiple connection along the length of the aorta successively as they ascend

Question 22

Name three common variations in kidney development.

Answer 22

pelvic kidney or horseshoe kidney (metanephric tissue bilaterally is joined and gets caught on the inferior mesentery while ascending , duplication of the ureter (bifid ureter); rare: rectovesicular fistula is a compartment traveling between the rectum and bladder and renal a genesis (proper kidney never fully forms)

Question 23

What is the difficulty associated with polar renal arteries?

Answer 23

can obstruct the renal pelvis (ureter)

Question 24

What is a patent urachus?

Answer 24

when allantois does not become the median umbilical ligament, in which case the bladder has an opening at the umbilicus and urine may drain through it