A viscous liquid, a protein, passes through minute tubes in the spider’s body, and the liquid is changed to a solid thread by a rearrangement of its protein molecules, explains Encyclopædia Britannica.
Viskoosne vedelik – valk – läbib ämbliku kehas olevad pisitillukesed torukesed, nii et vedelik muutub valgumolekulide ümberkorraldumise tulemusel tahkeks niidiks, seletab „Encyclopædia Britannica ”.