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Human Bio chapt 17
Development and Aging
| Question | Answer |
|---|---|
| The three germ layers in an Embryo are: | Ectoderm, mesoderm, and endoderm |
| Ectoderm: | Nervous system and sense organs Pituitary glands skin and outer structures such as hair |
| Mesoderm: | Cartilage, bone, muscle, connective tissue cardiovascular system lymphatic system urinary system reproductive system outer layers of digestive tube |
| Endoderm: | lining of digestive tube and lining of respiratory airways |
| zygote: | the first cell of a new individual |
| cleavage: | when cell divisions convert the zygote to a ball of cells called a morula |
| A blastomere is what? | an individual cell in the morula |
| The three stages of tissue specialization: | determination, differentiation, and morphogenesis |