spermiation
spermiogenesis
spermatogenesis
androgenesis
B. spermiogenesis
die immediately
start dividing
will remain undivided
transform into a tadpole at a faster rate
monoecious
dioecius
intersexual
hermaphrodites
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
paedogamy
autogamy
isogamy
anisogamy
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
copulation
amphimixis
syngamy
amplexus
holoblastic
meroblastic
diploblastic
triploblastic
vitellogenesis
oogenesis
spermatogenesis
fertilization
man
hen's egg
frog
rabbit
ovulation
oogenesis
vitellogenesis
folliculogenesis
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
3
8
4
12
foregut
midgut
hindgut
somatopleure
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
fertilized egg
spermatozoa
unfertilized egg
egg membranes
Vasa efferentia, Bidder's canal, uriniferous tubule and nephrotome
Vasa efferentia, Bidder's canal, and uriniferous tubule
Vasa efferentia, uriniferous tubule nd Bidder's canal.
Vasa deferentia, uriniferous tubule and Bidder's canal
straight
curved
coiled
zig-zag
the spermatids differentiate into spermatozoa
primary spermatcyte is tarnsformed into a secondary spermatocyte
spermatogonea complete multiplication phase
secondary spermatocyte extrudes polar bodies
primary oocyte
secodnary oocyte
ootid
gonocyte
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
a cord between mother and foetus
place of attachment in uterus wall where exchange of material between mother and foetus takes place
outer covering of foetus
allantoic part of the uterus
enlarges in size
decreases in size
retains the same size at the beginning
gradually enlarges in size
epiboly
emboly
both and
delamination
early blastula
late blastula
early gastrula
lategastrula
ova
sperm
both and
primary spermatogonia
endoderm
mesoderm
ectoderm
chordomesoderm
mammals
lizards
fowls
earwigs
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
4-5 years
6-8 years
8 - 10 years
12 -14 years