A jointed or segmented structure inside the sternum or breastbone, especially relating to the internal skeletal supports in arthropods.
From endo- (within) + sternite (a plate-like body part), from Greek sternon (breastbone). Zoological and entomological term describing arthropod internal anatomy.
Insects and crustaceans have endosternites—internal bracing systems that insects use to anchor their massive flight muscles, making them nature's most efficient flying machines!
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