Urogenital System

Urogenital System

combination of urinary (excretory) and reproductive (production of gametes) system

Mesonephros

the principal excretory organ during early embryonic life

epithelial-mesenchymal interactions

the development of mesonephros depends on

lateral side of the descending aorta

location of mesonephros

kidney

fate of mesonephros

mesonephric tubules and glomeruli

temporary kidneys

glomeruli

filtering unit of metanephros lined with capillaries and contained blood cells

gonad rudiment

also known as genital ridge or germinal epithelium

reproductive organ

fate of gonad rudiment

testes

fate of gonad rudiment / genital ridge / germinal epithelium in male

ovary

fate of gonad rudiment / genital ridge / germinal epithelium in female

gonad rudiment

consists of a localized thickening of visceral peritoneum (that is, a localized thickening of the splanchnic mesoderm that covers the organs of the peritoneal cavity), called the germinal epithelium, and a subjacent region of condensed mesenchyme

mesonephric or wolffian ducts

will form the epididymis, vas deferens, and ejaculatory duct of adult male reproductive system

seminal vesicle

mesonephric ducts or wolffian ducts will also give rise to an evagination that forms the

epididymis

storage of sperm

vas deferens

passageway of sperm

ejaculatory duct

secretion of semen

seminal vesicle

storage of semen

degenerate

fate of mesonephric ducts in females

ureters

tubular structures that transport urine from the renal pelvis into the bladder

passageway of urine from kidney to urinary bladder

ureters

ureter

fate of ureter

renal pelvis

the distinct epithelial walls of these structures later bud repeatedly, forming the major and minor calyces and collecting tubules of the metanephric kidneys

middle portion of the ureter

location of renal pelvis

part of the kidney, major and minor calyces, and collecting tubules

fate of renal pelvis

collects urine

function of renal pelvis

nephrogenic tissue

very dark mass of cells just outside each renal pelvis, which forms the secretory tubules

secretory tubules

fate of nephrogenic tissue