Reproductive System Devo Flashcards
sex determination is set at ________, sex differentiation occurs during _________
fertilization; the embryonic and fetal periods
what forms during the Indifferent stage?
undifferentiated gonads, ducts and external genitalia
what directs gonads to form testes?
expression of SRY gene
development: _____ forms the glans clitoris, _____ form the labia minora, and _____ form the labia majora
genital tubercle; urethral/urogenital folds; labioscrotal swellings
lining of penile urethra is derived from _____ and the portion of the penile urethra within the glans is formed by an ingrowth of _____
the endoderm of the phallic part of the UG sinus; ectoderm
development: _____ forms the glans penis, _____ forms the prostate gland, and _____ forms the scrotum
genital tubercle; urogenital sinus; labioscrotal swellings
caudal 1/3 of paramesonephric ducts fuses and becomes _____, cranial 2/3 remains unfused and becomes _____
uterus and part of vagina; oviduct
in females, cystic remnants of the mesonephric duct can be found where?
within the broad ligament
development: budding of the primordia of the prostate is induced by ______
UG sinus mesenchyme
derivatives of mesonephric duct in males
SEED: seminal vesicles, epididymis, ejaculatory duct, ductus deferens
gonad attachments: cranially (superiorly), the mesenchyme forms a _____ in which will develop the ______. Caudally (inferiorly) a condensation of mesenchyme forms the ______ that attaches the primitive gonad to the ______
suspensory ligament; vascular supply to the gonad; gubernaculum; ventral body wall
what are the cells that are gamete progenitor cells of extra-gonadal origin and that migrate to the gonad during development?
primordial germ cells
