- The
amniotic sac, also
called the bag of
waters or the membranes, is the
sac in
which the
embryo and
later fetus develops in amniotes. It is a thin but...
- The yolk
sac is a
membranous sac attached to an
embryo,
formed by
cells of the
hypoblast layer of the
bilaminar embryonic disc. This is alternatively...
-
gametophyte —
specifically termed a
megagametophyte — is also
called the
embryo sac in angiosperms. The
megagametophyte produces an egg cell for the purpose...
- is
reduced to only a few cells, and is
sometimes called the
embryo sac. A
typical embryo sac contains seven cells and
eight nuclei, one of
which is the...
- The
gestational sac is the
large cavity of
fluid surrounding the
embryo.
During early embryogenesis, it
consists of the
extraembryonic coelom, also called...
- nucellus, and the
female gametophyte is
sometimes called the
embryo sac or
embryonic sac. Two
distinct processes are
involved in
producing the megagametophyte...
-
product of the
ripened ovule,
after the
embryo sac is
fertilized by
sperm from pollen,
forming a zygote. The
embryo within a seed
develops from the zygote...
- the pre-
embryo, the amnion, yolk
sac and allantois,
while the
fetal part of the
placenta will form from the
outer trophoblast layer. The
embryo plus its...
-
reduced in size, and are
represented by the
germinated pollen and the
embryo sac. The
sporophyte produces spores (hence the name) by meiosis, a process...
- into a
fruit and each
ovule into a seed. As the
embryo and
endosperm develop, the wall of the
embryo sac enlarges and
combines with the
nucellus and integument...
