Relating to or describing the internal breastbone or internal skeletal support structures in arthropods.
From Greek 'entos' (inside) and Latin 'sternum' (breastbone), with the adjectival suffix '-al'. This anatomical adjective describes the nature of internal arthropod skeletal features.
The 'entosternal' system in insects is like their invisible skeleton inside the skeleton—it's where their muscles attach to help them move those six legs so efficiently.
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