- is
reorganized into a two-layered or three-layered
embryo known as the
gastrula.
Before gastrulation, the
embryo is a
continuous epithelial sheet of cells;...
-
blastula develops into a
structure called a
gastrula through a
process called gastrulation. The
gastrula then
undergoes further development, including...
-
embryo enlarges, and is the
essential precursor for the
differentiated gastrula.[page needed] In the
Xenopus a very
small cavity has been
described in...
-
early embryo become a blastula. The
blastula precedes the
formation of the
gastrula in
which the germ
layers of the
embryo form. A
common feature of a vertebrate...
-
Triploblasty is a
condition of the
gastrula in
which there are
three primary germ layers: the ectoderm, mesoderm, and endoderm. Germ
cells are set aside...
-
multiple layers, a
gastrula (seen in the
figure to the right). Reptiles,
birds and
mammals are
triploblastic organisms,
meaning the
gastrula comprises three...
-
Cells migrating inward along the
archenteron form the
inner layer of the
gastrula,
which develops into the endoderm. The
endoderm consists at
first of flattened...
- the
presence of
neurons and muscles, and an
embryo that goes
through a
gastrula stage. Some
phylogenists once
speculated the
sponges and
eumetazoans evolved...
-
undergoes more
complicated rearrangement. It
first in****tes to form a
gastrula with a
digestive chamber and two
separate germ layers, an
external ectoderm...
- as well. The term
refers to the
order of
organization of
cells in the
gastrula leading to
development of the coelom. In mollusks, annelids, and arthropods...
