cockroach digestive system, efficient digestion, nutrient absorption for survival

vector reproductive organs insects digestive tract system cockroaches anatomy cockroach coxa rectum information colon science bug pesticide biology pest graphic insect thorax prothorax head domestic foreleg abdomen cercus palp antenna male creepy crawling background closeup blue infestation food control nature organism efficient digestion nutrient absorption survival comprises specialized structures like foregut midgut hindgut enabling