▁well - character ized ▁morph ogen etic ▁movements ▁during ▁g astr ulation ▁and ▁early ▁development , ▁including ▁germ - band ▁extension , ▁formation ▁of ▁several ▁fur rows , ▁vent ral ▁inv ag ination ▁of ▁the ▁mes od erm , ▁and ▁posterior ▁and ▁anterior ▁inv ag ination ▁of ▁end od erm ▁( g ut ), ▁as ▁well ▁as ▁extensive ▁body ▁segment ation ▁until ▁finally ▁h atch ing ▁from ▁the ▁surrounding ▁cut icle ▁into ▁a ▁first - inst ar ▁lar va . ▁ ▁During ▁lar val ▁development , ▁t issues ▁known ▁as ▁imag inal ▁disc s ▁grow ▁inside ▁the ▁lar va . ▁Im ag inal ▁disc s ▁develop ▁to ▁form ▁most ▁structures ▁of ▁the ▁adult ▁body , ▁such ▁as ▁the ▁head , ▁legs , ▁wings , ▁thor ax , ▁and ▁gen ital ia . ▁C ells ▁of ▁the ▁imag inal ▁dis ks ▁are ▁set ▁aside ▁during ▁emb ry ogen esis ▁and ▁continue ▁to ▁grow ▁and ▁divide ▁during ▁the ▁lar val ▁stages — un like ▁most ▁other ▁cells ▁of ▁the ▁lar va , ▁which ▁have ▁differenti ated ▁to ▁perform ▁special ized ▁functions ▁and ▁grow ▁without ▁further ▁cell ▁division . ▁At ▁met am orph osis , ▁the ▁lar va ▁forms ▁a ▁pup a , ▁inside ▁which ▁the ▁lar val ▁t issues ▁are ▁re abs or bed ▁and ▁the ▁imag inal ▁t issues ▁under go ▁extensive ▁morph ogen etic ▁movements ▁to ▁form ▁adult ▁structures . ▁ ▁Development al ▁pl astic ity ▁ ▁Bi otic ▁and ▁ab i otic ▁factors ▁experienced ▁during ▁development ▁will ▁affect ▁development al ▁resource ▁allocation