Homology and analogy
If biology was a cross-interest subject in IIS, I’m sure I will understand.
In evolution, there are terms called homology and analogy.
a. Homology are organs that have different functions, but have the similar prototype. Example: butterfly’s wings and human’s hands; bird’s wings and human’s arms.
b. Analogy are organs that have different structures, but have the similar functions. Example: penguin’s wings and bird’s wings. (they’re both birds, but their wings are different in structure)
Subjects of anatomy had been studied by humans since their early existence.