Lecture 9 Flashcards
Describe the two sources of embryonic tissue origin for the pituitary gland
Pituitary gland is developed from two sources of embryonic tissue:
- The oropharynx ectoderm which develops into rathkes pouch
- Neuroectoderm which develops into the infundibulum and the posterior lobe.
What are the adult derivatives of rathke’s pouch
- Adenohypophysis/ pars distalis
- pars tuberalis
- pars intermedia
What are the adult derivatives of the infundibulum?
- Stalk
- pars nervosa = neurohypophysis
What week are we able to differentiate male vs female in terms of gonadal structures?
Week 7
What are the testis cords composed of?
- primitive germ cells
- sustentacular cells derived from testis surface epithelium
As testis decend into the scrotum what are they covered by?
- before the ascent?
- After the descent?
- Processus vaginalis
- visceral layer of tunica vaginalis
- parietal layer of tunica vaginalis
- transversalis fascia
- internal spermatic fascia
- Internal abdominal oblique m.
- Cremasteric fascia and muscle
- External abdominal oblique m.
- External spermatic fascia
Which abdominal muscle does not contribute a layer to the testis?
Transversus abdominis m.
What are the three differences between the development of male and female gonads?
Males: medullary cords develop, no cortical cords form, thick tunica albuginea
Females: medullary cords degenerte, cortical cords develop, and no tunica albuginea
What is the origin of the vagina?
The vagina has two origins
1) fornix/cervix and uterus formed by paramesonephric ducts (uterine canal)
2) Lower portion derived from urogenital sinus
Cloacal folds join to form what two strucutures (cranially/caudally)?
Cranially: genital tubercle
caudally: urethral folds/ anal folds
What does the genital swelling become in the male? in the female?
Male: scrotal swelling
female: Labia majora
What are the main differences in the development of external genitalia between males and females?
MALES:
- rapid elongation of gential tubercle to form phallus
- Urethral folds close over to form penile urethra
Females:
- Genital tubercle elongates slightly to form clitoris
- urethral folds do not fuse and form labia minora
- urogenital groove is open and forms the vestibule of the vagina
What are the derivatives of the gubernaculum in the female?
Ovarian ligament and round ligament of the uterus
What are the ligaments associated with female reproduction? What do the connect?
- Suspensory ligament of the ovary
- diaphragm to ovary
- round ligament of the ovary
- ovary to posterior uterus
- broad ligament
- covers the uterus
- round ligament of the uterus
- isthmus of the uterine tube through inguninal canal
What do the paramesonephric ducts connect to?
sinus tubercle
