Fetal Circulation Anatomy

1
Fetal Circulation Anatomy
ductus arteriosus
foramen ovale
ductus venosus
umbilical vein

umbilicus
umbilical arteries
umbilical cord
placenta
2
Preembryonic Fission
4 cell stage
cleavage
fertilization
morula
zygote
blastocyst
antrum (cavity)
ovulation
inner cell mass
trophoblast
implantation
3
Gastrulation Diagram
b
j
g
f
a
e
i
h
c
d
maternal portion