embryology

Question 1

kidneys develop from what 3 systems?

Answer 1

pronephros

mesonephros

metanephros

Question 2

pronephors?
appear when?
where?

Answer 2

appear 4th week of development - begins in cervical region
its intermediate mesoderm
= pronephric duct + pronephric tubules

Question 3

mesonephros?

Answer 3

develop inferior to pronephros

pronephric duct INTO
MESONEPHRIC tubules and duct

Question 4

metanephros?
appear when?

forms what?

Answer 4

forms definitive kidney - appears 5th week and is functional on 12th week

ureteric bud sprouts from mesonephric duct - forms collecting system, ureter, pelvis etc

and metanephric mesoderm - forms excretory system and nephrons

Question 5

what mesoderm forms kidney and repro?

Answer 5

intermediate plate mesoderm

Question 6

allantois?

Answer 6

out pouching of endoderm at hindgut - has waste products and increases in size

Question 7

cloaca divides into? 2

separated by?

Answer 7

rectum posteriorly
urogenital sinus anteriorly

separated by urorectal septum

Question 8

allantois fate?

Answer 8

obliterates at birth - forms urachus (runs in umbilical cord)

Question 9

urogenital sinus forms what?

Answer 9

urinary bladder

Question 10

what happens to mesonephos?

Answer 10

will be incorporated into developing gonad and recycled

mesonephric tubules - rete testis
mesonephric duct - vas deferens(spermatic cord)

Question 11

nephron includes?

Answer 11

renal corpuscle
proximal tube
loop of Henle
distal tube

Question 12

uriniferous tubule includes?

Answer 12

nephron + collecting duct

Question 13

kidney ascent meaning?

Answer 13

last process
appear to ascend into abdomen -
and come to lie at T12-L3

AND rotates so hilum lies medially

Question 14

mesonephros duct drains into?

Answer 14

cloaca

Question 15

ureter develops from?

Answer 15

ureteric bud