If the context was "to take apart the parts from the body," is there no difference between them?

I would say that, if you dismantle something then you may not have the intention of putting it together again. You might do, but it's not certain

If you disassemble something, it is usually with the intention of inspecting it or repairing it, and then putting it back together again

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Your explanation is very convincing. Thanks.
Also, (in US English) these tend to be used with different items, "disassemble" with machinery and complicated mechanical devices, and "dismantle" with non-mechanical, less-complicated things. For example:

"We disassembled with engine in preparation for a complete overhaul of it."

"We dismantled the movie set after shooting was completed."


Well explained👌

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