direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
B. indirect ontogenic development
birds
mammals
insects
molluscs
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
ovulation
fertilization
implantation
entry of sperms into vagina
ovulation
oogenesis
vitellogenesis
folliculogenesis
Frog
Housefly
Hydra
Mosquito
the spermatids differentiate into spermatozoa
primary spermatcyte is tarnsformed into a secondary spermatocyte
spermatogonea complete multiplication phase
secondary spermatocyte extrudes polar bodies
3
8
4
12
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
foregut
midgut
hindgut
somatopleure
4-5 years
6-8 years
8 - 10 years
12 -14 years
ovuation
placentation
gestation
parturition
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
endoderm
mesoderm
ectoderm
chordomesoderm
Proteins
Nucleoplasm
DNA
RNA
flagellum
acrosome
sperm lysins released from the acrosome
mitochondira located at the middle piece
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
holoblastic
meroblastic
diploblastic
triploblastic
fertilized egg
spermatozoa
unfertilized egg
egg membranes
sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
histogenesis
paedogenesis
histolysis
paedomorphosis
vitellogenesis
oogenesis
spermatogenesis
fertilization
monoecious
dioecius
intersexual
hermaphrodites
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
epiboly
emboly
both and
delamination
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
Spider
Crow
Honeybee
Earthworm
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
epiboly
emboly
morphogenetic movements
involution