Lecture 29: Urinary Tract and Adrenals Flashcards Preview

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Flashcards in Lecture 29: Urinary Tract and Adrenals Deck (26):
1

Pronephros

4th embryonic week, cervical nephrotomes which come off of pronephric duct. Is both transitory and nonfunctional

2

Mesonephros

Late in the fourth wekk, functional temporarily, consists of two nephrotomes which turn into glomerulie, mesonephric tubules which come off of the mesonephric duct.
Degenerate at end of first trimester

3

Three stages of embryological kidneys

ronephros, mesonephros, metanephros

4

Each mesonephric tubule ends in?

A bowmans capsule

5

Parts of adult kidney

cortex, medulla, collecting system --> ureter

6

metanephros

definitive kidnesy, development begins in fifth week, functional begins in 9th week. After 12th wekk, majority of amniotic fluid is fetal urine

7

fetal urine vs. adult urine

much more watery as mother removes more metabolic waste from the urine. Fetus drinks urine, re-filters it, pees it out.

8

metanephric diverticulum

also called ureteric bud, it is an outgrowth of the distal mesonephric duct--> gives rise to ureters renal pelvis, calices, and collecting tubules.

9

metanephric mass of intermediate mesoderm gives rise to?

also called metanephrogenic blasteme. Gives rise to nephrons (filtration system of the kidneys)

10

how do the metanephric diverticulum and the metanephric mass of intermediate tissue effect each other?

the ureteric bud grows into the the intermediate tissue and induces the metanephrogenic blastoma.
the metanephrogenic blastema induces the ureteric bud to undergo successive branching

11

Branching of ureteric bud

Major Calices (1-4) --> Minor Calices (4-8) --> collecting tubules (>8)

12

What makes up a corposcule

The bowmans capsule and the glomerulus

13

Parts of nephron

Corposcule, proximal convoluted tubule, loop of henle, distal convoluted tubule

14

metanephric vesicles, what induces them and what do they turn into?

Initial metanephric blastema growth, induced by outgrowth of ureteric bud (primordial collecting tubule). Elongate into metanephric tubules, which attach to ureteric bud, become continuous with it.

15

What creates the bowman's capsule?

Is the metanephric tubule (now attached to the ureteric bud) that becomes invaginated by the glomerulus capillaries

16

What develops into the urorectal septum

The cloaca.

17

What does the urorectal septum separate?

The rectum, and the urogenital sinus

18

parts of the urogenital sinus

vesicle part --> bladder
pelvic part --> urethra
phallic part --> grows towards genital tubercle

19

epithelium of bladder

endoderm

20

outer layer of bladder

mesoderm

21

relationship of early bladder and alantois

They are continuous with each other

22

what does the urethra develop from?

The metanephros

23

trigone of the bladder

forms a triangle, top two points are where the ureters enter, bottom point where urethra exits

24

position of bladder in children vs. adults

children is abdominal, adult is pelvic

25

potter sequence

not enough amniotic fluid for the fetus, the body doesn't have enough space to grow so the bones and muscles are all squished up

26

prune belly syndrome

Connections between the two portions of the urethra were not made, the body is not releasing it's urines fom posterior urethral valves. This also means that there is not enough amniotic fluid for the baby.