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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 |