Sensilla
Overview
Insect
Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...
sensory organ protruding from the cuticle
Cuticle
A cuticle , or cuticula, is a term used for any of a variety of tough but flexible, non-mineral outer coverings of an organism, or parts of an organism, that provide protection. Various types of "cuticles" are non-homologous; differing in their origin, structure, function, and chemical composition...
, or sometime lying within or beneath it. Sensilla are divided in chemical, mechanical (e.g. : Campaniform sensilla
Campaniform sensilla
Campaniform sensilla are mechanoreceptors found in insects. When the exoskeleton bends the resulting strain stimulates the sensilla. The displacement is transmitted down until it reaches the central nervous system. The term campaniform refers to the bell shape appearance of these sensory structures...
), thermal and visual.