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34 Cards in this Set
- Front
- Back
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Organogenesis |
Formation of organs |
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Metamorphosis |
Animal larvae to adult and they don't look alike |
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Gametogenesis |
Gamete formation |
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Embryogenesis |
Stages of development between fertilization and hatching |
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Holoblastic |
Entire egg divides into smaller cells (frogs & mammals) |
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Meroblastic |
Only part of the egg becomes embryo (chicks) |
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Aristotle |
First embryologist & developmental biologist (observed chicks by cracking eggs |
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Harvey |
Phrase "ovo omnia" all mammals came from eggs |
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Malipighi |
First microscopic look at chick development and cellular movements |
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Epigenesis |
Organs of embryo formed from scratch in each new individual |
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Preformation |
Organs already present in miniature form |
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Hartsoeker |
1694 thought that infant preformed in sperm |
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Kolreuter |
1766- produced hybrid plants & could revert back by mating back with parents |
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German scientists |
Pander, von Baer, Rathke |
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Pander |
Discovered the germ layers ecto, endo, and mesoderm |
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Von Baer |
Commom pattern of very development (4 laws) |
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Rathke |
Discovered structures go on to become different structures in adults |
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Ectoderm |
Outer layer- skin, brain, & nervous system |
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Endoderm |
Middle layer- digestive tract and lungs |
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Mesoderm |
Inner layer- blood, heart, kidney, bones, and muscles |
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"Bildungstreib" |
By Kant/Blumenbach meaning developmental force; proceeds predetermined steps and instructions in fertilized egg |
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Darwin |
Argued all principles above to support relatedness |
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Oviparity |
Lays eggs |
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Viviparity |
Live births |
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Ovoviviparity |
Develops egg inside and hatches inside |
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Epithelial |
Cells that are lined up and tightly packed |
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Mesencyhmal |
Cells are associated but loosely connected |
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Fate map |
Map of where cells go during development |
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Chimera |
Embryos from tissue of more than one source |
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Vital dye |
Dye used to follow cells and where they go during development |
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Homologous |
Same structures derived from same common ancestor (arm, seal forelimb, bird, & bat wings) |
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Analogous |
Similar in function but not from common ancestor (insect wings and bird wings |
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Teratogens |
Agents like chemicals, radiation that cause disruption in development |
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Thalidomide |
Anti-anxiety medication that caused severe birth defects; never released in US due to Dr. Kelsey. |
