A chair leg or tabletop is a physical part. But 'animal' and 'rational' are conceptual components in the traditional logical definition of a human; they are not separate organs.
Calling animality a component of the human essence does not mean there is an animal-shaped piece inside the body. It means animality belongs to the defining concept of humanity.
Questions about physical structure and questions about conceptual essence must therefore be kept distinct.
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Conceptual components are not physical parts
Essence, Quiddity, and Essential vs Accidental Universals
A chair leg or tabletop is a physical part. But 'animal' and 'rational' are conceptual components in the traditional logical definition of a human; they are not separate organs.
Calling animality a component of the human essence does not mean there is an animal-shaped piece inside the body. It means animality belongs to the defining concept of humanity.
Questions about physical structure and questions about conceptual essence must therefore be kept distinct.