Biology Questions and Answers
- After the morula stage what
is the next stage? What is the
morphological feature that
defines this stage?
After passing the embryo is a compactthe morula mass of cells,stage in which
the next stage the blastula stage is the blastulathe compactness is stage. In
lost and an internal cavity filled with
fluid appears inside, the blastocele.
- After the blastula stage
what is the following stage of
the embryonic development?
What is the passage from
blastula to the next stage
called?
The blastulaprocess know turns into gastrula in n as gastrulation. a
- What is gastrulation? How
during gastrulation are the
first two germ layers formed?
What are these germ layers?
Gastrulation iswhich a portion o the process throughf the blastula wall
undergoes invagination inside the
blastocele, foarchenteron (primitive intestinrming a tube callede). The (^)
cells of the inner side of the tube form
the endoderm (germ layer) aof the outer side form the ectodermnd the cells
(another germ layeof the tissue differentiationr). It is the beginning in embryonic
development.
- What are the archenteron
and the blastopore? What is
the stage of the embryonic
development in which these
structures are formed? What
are the destinations of the
archenteron and of the
blastopore?
Archenteron is thgastrulation by means oe tube formed duringf invagination o (^) f
the blastula wall insidis the origin of the gastrointe the blatocelestinal tract.e. It (^)
Blastopore is the opening of the
archenteron to the exterior. blastopore gives birth to one of theThe (^)
extremities of the digestive tube: the
mouth in protostome banus in deuterostome beings.eings, or the
- How is the mesoderm
(third germ layer) of
triploblastic animals formed?
The mesoderm appears frdifferentiation of endodermal com (^) ells that
cover the dorsal region of thearchenteron.
- What are the three types
of germ layers that form
tissues and organs in animals?
The three germ layers are ectoderm, the mesoderm athend the (^)
endoderm.
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