Reproductive embryology 2 Flashcards
How many sets of kidneys do we have throughout development and which set is the mesonephros?
3, mesonephros is the 2nd set
What forms the male reproductive system (other than the testis)?
Mesonephric ducts
What forms the female reproductive system (other than the ovaries)?
Paramesonephric duct
What are the mullerian and wolffian ducts?
Mullerian = paramesonephric Wolffian = mesonephric
Sertoli cells are derived from what part of the developing gonad and what hormone stimulates their development?
TDF stimulates the differentiation of the epithelium surrounding the primordial germ cells into sertoli cells
What hormone is produced by the sertoli cells and what does this cause?
Sertoli cells secrete anti mullerian hormone
This causes degeneration of paramesonephric ducts
From what part of the gonad are leydig cells derived?
Mesoderm
What causes the development of the leydig cells?
Sertoli cells stimulate the formation of leydig cells from the mesoderm of the gonad
What hormone do the leydig cells produce and what does this cause?
Testosterone
Promotes survival and further development of the mesonephric ducts
What connects the mesonephric ducts to the rete testis?
Epigenital tubules
What do the epigenital tubules form in the testis?
Efferent ductules
What is the appendix epididymis a remnant of?
The cranial part of the mesonephric duct above the testis
What is the Paradidymis a remnant of?
The paragenital tubules below the gonad
What forms the seminal vesicle?
Outpouching of the mesonephric duct
What 2 structures are found in the male reproductive system which are remnants of parts of the paramesonephric duct?
Utriculus prostaticus
Appendix testis
What hormones control the degeneration of the mesonephric duct and development of the paramesonephric duct in the female?
In the absence of TDF no sertoli cells and therefore no anti mullerian hormone is produced so the paramesonephric duct does not degenerate
In the absence of sertoli cells no leydig cells and thus no testosterone are produced so the mesonephric duct degenerates
What part of the paramesonephric duct forms the uterine tubes?
The cranial and middle parts
What part of the paramesonephric duct forms the uterus?
The caudal parts which fuse to form the uterine canal
From what is the cervix formed?
The caudal tip of the paramesonephric ducts