The internal organs and parts within the body, or the interior of something.
Compound of 'in' (Old English 'in') and 'side' (Old English 'sīde'). Originally referred to the interior surfaces or contents of something, then extended to mean internal organs.
Your insides are a constant conversation between different systems—your gut bacteria actually influence your mood through something called the gut-brain axis, meaning your stomach literally talks to your brain!
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