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Bio CH25
Biology CH25 Animal Development
Term | Definition |
---|---|
amniotic sac | a tissue filled with liquid that protects the embryo |
cleavage | the series of changes that take place to turn one fertilized egg into a hollow ball of many cells |
complete metamorphosis | a series of changes in an insect in which the young do not look like the adult |
fetus | an embryo that has all of its body systems |
incomplete metamorphosis | a series of changes in an insect from nymph to adult |
labor | contractions of the uterus |
larva | a young animal that looks completely different from the adult |
metamorphosis | the changes in appearance and lifestyle that occur between the young and the adult stages |
navel | where the umbilical cord was attached to the body |
nymph | a young insect that looks similar to the adult |
placenta | an organ that connects the embryo to the mother’s uterus |
pupa | a quiet, non-feeding stage that occurs between larva and adult |
umbilical cord | made of blood vessels that connect the embryo to the placenta |