Homologous Structure
상동기관
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<speciesfyi-glossary slug="homologous-structure"></speciesfyi-glossary>Definition
Body parts in different species that share a common evolutionary origin but may serve different functions.
Detailed Explanation
Homologous structures reveal deep evolutionary kinship despite wildly different functions. The human arm, bat wing, whale flipper, and horse leg all share the same arrangement of humerus, radius, ulna, carpals, and phalanges — modified by selection for different uses. Comparing homologous structures across species is a foundational method in both classic morphology-based and modern molecular phylogenetics.