Definition of dissects:
(v) :
(transitive) To analyze an idea in detail by separating it into its parts.
(v) :
(transitive) To study an animal's anatomy by cutting it apart; to perform a necropsy or an autopsy.
(v) :
(transitive) To study a plant's or other organism's anatomy similarly.
(v) :
(transitive, anatomy, surgery) To separate muscles, organs, etc. without cutting into them or disrupting their architecture.
(v) :
(transitive, pathology) Of an infection or foreign material, following the fascia separating muscles or other organs.