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Lab 3 quiz 2 (starfish and frog)
Terms in this set (58)
an egg early in development and before ferilization. seen as a circular structure containing a circular nucleus
the first cell of the new organism. similar to unfertilized egg but doest not have a distinct nucleus and may have a distinct fertilization envelope. uniform in color or slightly darker around the edges. the fertilization envelope is not seen in mammals, maybe zone pellucida instead
2/4/8 cell stage
stages of the embryo where 2/4/8 cells are present, respectively. note that the fertilization envelope is still present
a clump of 8-16 cells
a hollow sphere of cells. similar to the zygote in appearance but the ____ will be darker on the outside and lighter in the middle. starfish doesn't contain the inner cell mass
the hollow cavity inside of the blastula. this is seen as the lighter area in the middle of the blastula
the embryo after cells have migrated and germ layer formation has begun. The pattern of ____ in the star fish is different from the ___ pattern seen in humans. in the starfish, the embryo elongates and becomes more oval in shape. an invagination forms a cavity in the starfish that is open to the outside, this occurs 2 weeks after fertilization in humans
invagination of the gastrula
forms digestive tract, derived from endoderm
archenteron forms.. derived from...
opening to archenteron
blastopore forms the anus
blastopore forms... starfish?frog?
rounded area at the end of the archenteron (#5)
forms the tissues derived from mesoderm... derived from mesoderm
arch enteric vesicle forms... derived from...
specialized layers of cells that form distinct sets of tissues. ecto,meso,endoderm
germ layer found on outside f gastrula
forms epidermis and nervous system
germ layer found along the walls of the archenteric vesicle
forms mesodermal tissues such as mesenchyme
germ layer found along the walls of archenteron
forms inner lining of digestive system
free swimming stage of the starfish, multiple regions of the gut become apparent here
mouth of bipinnaria larva
entrance to the gut, larger than anus
formed from archenteron
mouth of bipinnaria larva formed from..
esophagus of bipinnaria larva
narrow tube from mouth to stomach, slightly wider than intestine
formed from archenteron
esophagus of bipinnaria larva formed from ...
stomach of bipinnaria larva
lare circular portion of gut of bipinnaria larva
formed from ..archenteron
stomach of bipinnaria larva formed from
intestine of bipinnaria larva
small tube leading from stomach to anus
formed from archenteron
intestine of bipinnaria larva formed from...
anus of bipinnaria larva
small, circular exit of the gut. general closer to an extreme side of the bipinnaria larva than the mouth
formed from blastopore
anus of bipinnaria larva formed from...
frog mature oocyte
in a frog: a circular cell w a thin dark area on one side.
in a frog: the side of the oocyte that contains nuclear DNA, recognized by darker pigment, faster division, results in micromeres during cleavage
in a frog: the side of then fertilized egg that is not darkly pigmented, cells divide slowly into macromeres.
in a frog: small circular structures found in the vegetal pole containing yolk as food for embryo. cell division in this area is slow because of food production
small cells of early embryo in a frog found in animal pole, not present in humans
larger cells of early embryo in a frog, found in vegetal pole, not in humans
in a frog: it contains micromeres and macromeres, hollow inside
in a frog: the hollow cavity in the blastula, micromeres on same side as ___, macromeres on opposite side
in a frog: the embryo after the cells have migrated and germ layer formation has begun. dorsal and ventral lips are seen. outer layer of cells not continuous
blastopore in a frog
in a frog: opening of the embryo, found between the dorsal and ventral lips of gastrula
dorsal lip of blastopore/primitive node
in a frog: area adjacent to the blastopore where gastrulation has occurred, more well defined and bigger than the ventral lip. major role in frog development. cells migrating around this lip will form germ layers
ventral lip of blastopore
in a frog: adjacent to the blastopore where gastrulation has occurred, less prominent than dorsal lip
archenteron in a frog:
in a frog: large cavity adjacent to dorsal lip of blastopore. as gastrulation continues, the ___ increases in size as the blastocoel becomes smaller
forms the gut, is lined with endoderm
archenteron in a frog forms... is lined w...
blastocoel in a frog
in a frog: cavity in the embryo that is not the archenteron, can be distinguished from archenteron because its not adjacent to dorsal lip.
in a frog: the embryo during formation of the neural tube. after gastrula, neural folds and groove form here. similar to human formation
in a frog: the groove at the top of the embryo in the neurula
becomes part of neural tube... formed from neural plate... derived from ectoderm
in a frog: neural groove becomes part of... formed rom.. derived from...
in a frog: folds lateral to neural groove
join to form neural tube, formed from neural plate, derived from ectoderm
in a frog: neural folds form... formed from... derived from...
archenteron in a frog
in a frog: has continued from the gastrula stage, large cavity in embryo. blastocoel has disappeared.
forms gut, line w endoderm
in a frog: archenteron forms... lined with...
neural tube in a frog
in a frog: circular structure w thick walls. this _____ is formed from the fusion of the neural folds. dorsal side of embryo
forms brain and spinal chord, formed from neural groove and folds, derived from ectoderm
in a frog: neural tubeforms... formed from... derived from...
notochord in a frog
a long rod that is found just ventral to the neural tube. small circle formed during gastrulation. aids in development of neural tube. chordates are named for the presence of this
derived from mesoderm
notochord in a frog derived from...
THIS SET IS OFTEN IN FOLDERS WITH...
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