It turns out that certain marine worm species develop bristles piece by piece, similar to the process of 3D printing.
A new study has shed light on how certain marine worms form bristles, hair-like projections on each side.
“The process begins with the tip of the bristle, followed by the middle section, and finally the base of the bristles. The finished parts are pushed further and further out of the body. In this development process, the important functional units are created one after the other, piece by piece, which is similar to 3D printing,” explained Raible.
Much like the nozzles of a 3D printer, these microvilli sculpt the bristles with precision, layer by layer. The precise change in the number and shape of these microvilli over time was, therefore, the key to shaping the geometric structures of the individual bristles, such as individual teeth on the bristle tip, which were precise down to the sub-micrometer range, he added.
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