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Updated: Jan 18, 2026

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Published on: May 5, 2022
Form and function in biological filaments: a physicist's review.
Jan Cammann1, Hannah Laeverenz-Schlogelhofer2, Kirsty Y Wan2
1Interdisciplinary Centre for Mathematical Modelling and Department of Mathematical Sciences, Loughborough University, Loughborough LE11 3TU, UK.
Biological filaments, from molecular cytoskeletons to animal forms, demonstrate how shape dictates function across diverse scales. This review explores unifying physical principles governing these elongated biological structures.
Area of Science:
- Biophysics
- Cell Biology
- Evolutionary Biology
Background:
- Nature utilizes elongated shapes and filaments for structural stability, motion generation, and complex interactions.
- Biological filaments operate across a vast range of length scales, from molecular components to macroscopic organisms.
Purpose of the Study:
- To review the diverse roles of biological filaments across multiple length scales.
- To identify unifying mechanisms that link the form and function of biological filaments.
- To explore physical principles governing filament-based biological systems.
Main Methods:
- Literature review of biological filaments across different scales.
- Analysis of physical principles and models (e.g., elasticity, active matter).
- Cross-scale comparison of form-function relationships in biological systems.
Main Results:
- Cytoskeletal filaments provide dynamic cellular scaffolding.
- Cilia and flagella enable cellular motility.
- Filamentous microorganisms and elongated animals exhibit diverse forms and functions.
- Unifying physical principles connect systems across nine orders of magnitude.
Conclusions:
- Elongated biological structures exhibit conserved principles of form and function.
- Physical models offer insights into the mechanics of biological filaments.
- Understanding biological filaments has implications for fields like robotics and materials science.
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