A small capsule or pouch-like structure, especially in medical terminology; the singular form of capsulae.
From Latin 'capsula' meaning small box or container, diminutive of 'capsa' (box). Used in anatomy and medicine to describe enclosed structures.
In anatomy, 'capsula' appears in dozens of scientific names—like the internal capsule of your brain or the renal capsule around your kidney—because doctors use Latin names to describe these pocket-like structures!
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