30 juin 2017

Pourquoi les limaces et les escargots bavent-ils ?

Pourquoi les limaces et les escargots bavent-ils ?



image: 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





La vraie question est comment peuvent-ils marcher sur un pied dans de la glue ? Car le mucus gluant que produisent les escargots et les limaces n’est pas seulement un lubrifiant, c’est aussi une colle. On peut même le décrire comme « visco-élastique ». En exerçant différents efforts de torsion avec son pied sur le mucus, le mollusque peut en modifier les propriétés. Résultat : il glisse gracieusement sur une surface rugueuse à un moment donné, et le suivant, fait de l’escalade à la verticale !

Read more at http://islamiates.e-monsite.com/blog/articles-divers/pourquoi-les-escargots-bavent-ils.html#KTRRlZTCoHzbQKaI.99








سبحانك اللهم و بحمدك أشهد أن لا إله إلا أنت أستغفرك و أتوب إليك

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