Cutícula arthropodorum, in qua sensilla (8–11) observantur; 8 et 9: cellulae associatae; 10: terminatio nervosa; 11: elementum cuticulare A: Cuticula et epidermis; B: Singulum epicutículae. 1: Epicutícula; 1a: Caementum; 1b: Ceras?; 1c: Epicuticula externa; 1d: Epicuticula interna. 2: Exocuticula; 3: Endocuticula; 2+3: Procuticula; 4: Epithelium; 5: Lamina basalis; 6: Cellula epithelialis; 6a: Canalis porosus; 7: Cellula glandularis; 8: Cellula tricogena; 9: Cellula tormogena; 10: Terminatio nervosa; 11: Seta sensilis; 12: Seta; 13: Porum glandularis.
Sensillum est sensile arthropodorum organum, quod ex cuticula protrudit, vel aliquando in aut sub ea iacet. Sensilla in genera chemiarum, machinarum (e.g. Sensilla campaniformia), caloris, et oculorum digeruntur.