Urinary Embryology Flashcards Preview

HRM - Anatomy/Embryology/Histology > Urinary Embryology > Flashcards

Flashcards in Urinary Embryology Deck (24):
1

What are the three parts of the urogenital sinus?

Vesicle part
Pelvic (middle) part
Phallic part

2

What does the vesicle part of the urogenital sinus form?

Urinary bladder

3

What does the pelvic (middle) part of the urogenital sinus form?

Bladder neck and prostatic urethra in male
Entire urethra in female

4

What does the phallic part of the urogenital sinus form?

Penile urethra

5

What is formed by the mesonephric ducts incorporating into the posterior bladder wall?

Trigone of the bladder

6

What is the distal male urethra derived from?

Ectodermal cord

7

What embryonic tissue makes up the connective tissue and smooth muscle of the urinary bladder and urethra?

Splanchnic mesenchyme

8

What developmental abnormality can result from partial failure of epithelial cell degeneration in the urachus?

Urachal cyst

9

What developmental abnormality can result from failure of the umbilical urachus to close?

Urachal sinus

10

What developmental abnormality can result from a complete failure of the urachal duct to close?

Urachal fistula

11

What developmental abnormality can result from failure of mesenchymal cells migrating between ectoderm and cloaca?

Exstrophy of the bladder

12

What developmental abnormality can result from presence of posterior urethral valves in the bladder?

Megacystis or megalocystis

13

Who is megacystis most common in?

ONLY present in males

14

Where is the urethral valve present in a case of megacystis?

Where ejaculatory ducts enter prostatic urethra

15

What gives rise to the adrenocortical primordia?

Cranial part of urogenital ridge

16

What gives rise to the adrenal medulla?

Neural crest cells

17

What gives rise to the adrenal cortex?

Adrenocortical primordia (from cranial part of urogenital ridge)

18

What tissue makes up the fetal adrenal cortex?

Mesoderm

19

What part of adrenal tissue is very large in a neonate?

Cortex

20

What eventually replaces the fetal cortex?

Mesenchymal cells

21

What is defective in adrenogenital syndrome?

21-hydroxylase (Cytochrome P450-C21)

22

What is overproduced in adrenogenital syndrome?

Androgens
ACTH

23

What happens in female sexual organ development due to adrenogenital syndrome?

Masculinization of external genitalia

24

What happens to both males and females in childhood with adrenogenital syndrome?

EARLY rapid growth and skeletal muscle maturation