Term
| When does sexual differentiation begin in the developing embryo? |
|
Definition
| during week 7 of development |
|
|
Term
| When does sexual differentiation begin in the developing embryo? |
|
Definition
| during week 7 of development |
|
|
Term
| What is the urogenital ridge? |
|
Definition
| Intermediate mesoderm that forms a longitudinal elevation along the dorsal body wall. |
|
|
Term
| Where do primary sex cords develop from? |
|
Definition
| Gonadal ridge and incorporate primordial germ cells. migrate into gonad from wall of yolk sac. |
|
|
Term
| What develops into the rete ovarii and what is the fate of this structure? |
|
Definition
| Primary sex cords develop into the rete ovarii, which later degenerate. |
|
|
Term
| What do secondary sex cords develop into? |
|
Definition
| They incorporate primordial germ cells as a thin tunica albuginea forms. |
|
|
Term
| What happens to secondary sex cords as they form the ovary? |
|
Definition
| they break apart and form isolated cell clusters called primordial follicles, which contain primary oocytes surrounded by a layer of simple squamous cells. |
|
|
Term
| What causes the descent of the ovaries |
|
Definition
| They descend as a result of disproportionate growth of the upper abdominal region away from the pelvic region. |
|
|
Term
| Round ligament of the Uterus |
|
Definition
| Gabernaculum A band of fibrous tissue along the posterior wall that extends from medial pole of ovary to uterus at uterine tubes. Partial cause of descnet of ovary. |
|
|
Term
|
Definition
| develop as invaginations of the lateral surface of the urogenital ridge. |
|
|
Term
| What does the cranial portion of the paramesonephric duct develop into? |
|
Definition
|
|
Term
| What does the caudal portion of the paramesonephric duct develop into? |
|
Definition
| fuses in midline to form the uterovaginal primordium and thereby bring together two peritoneal folds called broad ligament. |
|
|
Term
| What structures develop from the uterovaginal primordium? |
|
Definition
| Uterus, cervix, superior one-third of vagina. |
|
|
Term
| What fuses to form the vaginal plate? |
|
Definition
| Sinovaginal bulbs induced by paramesonephric duct to form vaginal plate which canalizes and develops into inferior two-thirds of vagina. |
|
|
Term
| What dermal layer proliferates to form the 3 external swellings around the cloacal membrane? |
|
Definition
|
|
Term
| What does the phallus develop into? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Labia Majora and Mons Pubis |
|
|
Term
| What condition results from complete lack of fusion of paramesonephric ducts and sinovaginal bulbs? |
|
Definition
| Double Uterus and Double Vagina |
|
|
Term
|
Definition
| uterus has two horns entering a common vagina. partial fusion of paramesonephric ducts. |
|
|
Term
| Bicornate uterus with rudimentary horn |
|
Definition
| one side of uterus forms normally. results from retarded growth of one of paramesonephric ducts. |
|
|
Term
| Absence of uterus and Vagina |
|
Definition
| results from failure of paramesonephric ducts and sinovaginal bulbs to develop. |
|
|
Term
|
Definition
| condition where vaginal lumen is blocked. Failure of vaginal plate to canalize and form lumen. |
|
|
Term
| What are the two precursors to the vagina? |
|
Definition
| Sinovaginal bulbs, Uterovaginal primordium |
|
|
