embryology of the reproductive system Flashcards
Explain what the SRY gene does?
It enables formation of the testes.
What are the testicular cells and what do they secrete, more importantly, what does the secrete do?
Sertoli cells secrete MTI that inhibits the growth of Mullerian tubes (they grow to the fallopian tube, the uterus, and the upper 2/3rds of the vagina).
Leydig cells secrete testosterone that initiate the production of male genitalia and the mesonephric tube.
What would happen if the SRY gene didn’t exist?
The ovaries would remain as ovaries, producing estrogen to create the female genitalia, there would also be no MTI, further enabling the growth of the Mullerian tube (uterus, fallopian tube, and the upper 2/3rds of the vagina).
What are the embryonic progenitor parts?
The urogenital tubercle, the labioscrotal swelling, the urogenital sinus, and the urethral folds.
What does the urogenital tubercle become in males?
The glans of the penis, therefore the corpus spongiosum and the corpus cavernosum.
What does the urogenital tubercle become in females?
The glans clitoris and the vestibular glands.
What does the labioscrotal swelling become in males?
The scrotum.
What does the urogenital sinus become in males?
The urogenital sinus becomes the prostatic and membranous urethra, with prostate glands and the Cowper’s glands.
What does the urogenital sinus contain in females?
The female urethra, the paraurethral glands, and the Baltholin’s glands.
What does the urethral fold become in males?
The penile urethra and the shaft of the penis.
What does the urethral fold become in females?
It becomes the labia minora.
