Sensillum - Sensillum

Japanese: 感覚子 - かんかくし(英語表記)sensillum
Sensillum - Sensillum
These are tiny sensory organs found on the surface of insect bodies. They consist of a cuticular apparatus formed by changes in the body wall to receive stimuli, a small number of sensory cells attached to it, and cuticle-producing cells that act as supporting cells around the sensory cells. They receive chemoreception, mechanoreception, thermoreception, and hygroreception, etc. Depending on the difference in the cuticular apparatus, they are classified into setal sensilla with a hair-like structure on a thick cuticular wall, hair-like sensilla with a long hair-like structure on a thin cuticular wall, cone-shaped sensilla with a similarly short hair-like structure, fossa-like sensilla with a hair-like structure at the bottom of the depression, shield-like sensilla with a circular or elliptical plate-like structure, and bell-shaped sensilla with a dome-shaped structure. They are also classified according to the differences in their microstructure and function as determined by observation under an electron microscope.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
昆虫の体表などにある微小な感覚器のことで,刺激受容のために体壁が変化してできたクチクラ装置とこれに付着した少数の感覚細胞,および感覚細胞のまわりに支持細胞として働くクチクラ生成細胞からなる。化学受容や機械受容,温度受容,湿度受容などを行っている。クチクラ装置の違いにより厚いクチクラ壁の毛状構造の剛毛感覚子,薄いクチクラ壁で長い毛状構造の毛状感覚子,同じく短い毛状構造の錐状感覚子,凹みの底にも毛状構造をもった窩状(かじよう)感覚子,円形ないし楕円形の板状構造をとる楯状感覚子,ドーム状構造の鐘状感覚子などに分類されているが,さらに電子顕微鏡観察による微細構造の違いや機能の違いによる分類も行われるようになっている。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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