Relating to mitochondria, the tiny structures inside cells that produce energy and are sometimes called the 'powerhouses of the cell.'
From Greek 'mitos' (thread) and 'chondros' (grain or cartilage), referencing their threadlike appearance under early microscopes. The adjective form adds '-ial' to describe things related to mitochondria.
Mitochondria are actually the descendants of ancient bacteria that got swallowed by larger cells billions of years ago—they kept their own DNA, making them tiny aliens living inside every one of your cells, which is why scientists call this 'endosymbiosis.'
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