development of the ovary

Question 1

the germ cells originate where in embryo?

Answer 1

primitive hind gut. around 25th day

Question 2

where do the germ cells eventually inhabit?

Answer 2

gonads

Question 3

by 30 days what structure is complete with its mesentery?

Answer 3

the gut. germ cells can now migrate from gut to root of mesentery. germ cell no reduce at birth, and again at puberty to 300,000. a smaller no may be a factor leads to premature menopause

Question 4

coelomic epithelium proliferates and forms thickenings called?

Answer 4

genital ridges
- on either side of the mesenteric root, nearly developing kidney

Question 5

primitive gonad (genital ridge), consists of a mesoderm covered by coelomic epithelium. at this stage germ cells migrate from where to where?

Answer 5

root of mesentery to the genital ridge

Question 6

coelomic epithelium, growing into genital ridge forms what?

Answer 6

so called sex cords, which enclose each germ cells.

Question 7

around the 7th week the gonad is said to be distinguishable. true or false?

Answer 7

false

Question 8

the cords lose contract with surface epithelium and form small group of cells, each with its germ cell which forms what?

Answer 8

• a primitive follicle

Question 9

as the ovary grows it projects into what cavity?

Answer 9

peritoneal (coelomic) cavity
- thus forming a mesentery

Question 10

at the same time, the ovary descends expertaperitoneally within the abdominal cavity. what prevents complete descent through inguinal ring?

Answer 10

• ligaments
  suspensory and?