الفهرس 
development up to indeferent period
macroscopic structureOnly 14 pages are availabe for public view
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Abstract
tu--s was studied, begi.nn:il:.::: froc: the
formation of the r; ooital ridge to ttw fully differmtiated
gonad. The development of other organs of the g~1ital
system was also traced, though not in detai.l as the
gonads• ””” full stud;y of the gross anatomy of the genital
system. during the embryonic period, as well as in the adult
individual, was carriGd out.
2• Fro;;J. the first indication of the gonads, the
r1.ght one i.s locate<i at a higher level tho.n the left one,
a f’o•artL.re whic!:l J..S retained in ad.ult lizL’.rds· The primordial
germ cells app0d.t’ very eal”ly in the gonad developwer.t•
The vo.rious views explaining their or;i.gi.I11 were discussed
and coupured v:itll the results of the preCJ~lt investir_:u.tio:n•
Our r.e sults su ,,Jort the extra-ret:i.onal :forJ.1.:..tion of the . .
. 3• 3efore the di.fferentia.tioil. of tc1.e gonad into
i;c:sti3 cr DV’J.:1 1 i.•C• in the indi£fer=t :’c.:riod o:f ;;onad
duv oJopr:1ent • ,;,lee ti ssuo of the gonad is not distinEuished
L’1to cortex ar... u ~’odulla. This agrees witL tlw obs8rvation~ C’ -:
of the e;onad ll’-t c ,JeU .. ni te ov a:ry is det e.rmin ed by its
d.istinction inc,o cortex and medulla•
4• Although the gonads are macroscopically dist~~
guished from each other in very late sta~e of embryonic
development, male and i’ema.le individuals are distingui:shed
from each other more earlier, since the oviduct develops
at an easlier s”cae;e when in the male individuals, the ViOl$
de:t:el:’ens is not ,Yet developed·
5 • I.n c:;ale gonad, the present stud,y showed that the
development of sexual cords is not rostrict0d to the
medulla of til~.; t stis• Qroups of’ eells p:::·oliferate from
th,;: ~erminal epitheliUlll, directed towa.rds -c;1e medull2., and
pnrticip3.tiuc .i.a tr.o formation of sexual cords·
’)· i.:vuu.:_~ary cords appea.r in cert;cd..;l stctges of ovary
dovelopLH:lLt, out they later Cb.sappear. This featu.re was also
me.lltioned b,y sone other investiGators•
7 • l.n iJoth S·’;XeS, the rUdil:lent~;; !.iullarian duct
0mLr;; os wi tli still indifferent ;onads· In male
malo erubryos (’,:;: ,53-45 =• smout-cloaea le:c.,tL, it eoc;cpletely
disappe<,.res ·