Term
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Definition
mitotic cell divisions with cell growth between cycles
-froms blastula |
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Term
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Definition
-hollow ball of cells
-formed by cleavage |
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Term
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Definition
| one end of the embryo folds inward, expands and fills blastula forming gastrula |
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Term
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Definition
sexually immature form of an animal
9different from adult
-eats different food, different habitat
-after metamorphosis turns into juvenille |
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Term
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Definition
| makes outer covering of animal and embryo |
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Term
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Definition
inner germ layer
-become lining of digestive tube |
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Term
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Definition
lining of digestive tract
ex: liver, lungs |
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Term
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Definition
for bilateral symmetry
-b/w ectoderm and endoderm
0forms muscles |
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Term
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Definition
| have only ectoderm, endoderm, archenteron |
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Term
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Definition
| have endoderm, ectoderm, archenteron, and mesoderm |
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Term
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Definition
-type of developmental mode
-spiral cleavage
-anus=1st opening
-mouth-2nd opening
-determinate |
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Term
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Definition
-has radial cleavage
-perfectly parallel
-mouth=1st opening
-indeterminate cleavage |
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Term
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Definition
| -18th century idea that egg or sperm contains the embryo |
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Term
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Definition
First step in fertilization
-triggered in sperm after contact with egg
-when spem makes contact acrosome releases enzymes to mke hole in egg
-acrosomal process created
-protiens from acrosomal process bind to receptor on egg membrane
-plasma membranes fuse |
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Term
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Definition
2ND step in fertilization
-cortical granules in the egg fuse w/ membrane
-causes sperm receptors and jelly coat to fall off |
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Term
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Definition
the increase in Ca+ increases rate of Cellular Respiration
-20 min after sperm enters egg, the two nuclei merge |
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