Spiralen in der Nabelschnur tragen dazu bei, die Babys vor der Geburt kühl zu halten. Neue Forschungsergebnisse finden: «Das Spiraldesign der Blutgefäße in der Schnur scheint den Austausch von Sauerstoff und Wärme zu beeinflussen, wodurch das Risiko von Wärme und Sauerstoff verloren geht. »
https://www.manchester.ac.uk/about/news/spirals-in-the-umbilical-cord-help-to-keep-babies-cool-before-birth-new-research-finds/
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« The human umbilical cord is a vital spiral. However, its spiralled nature remains an unresolved puzzle. Our work has shown the power of mathematics in untangling the intricate geometry of the cord and its role in healthy pregnancy. Still, many unanswered questions remain about abnormal human cords and the cords in other mammals, which show a remarkable diversity of shapes. »
Reference: Tianran Wan at al., A functional shunt in the umbilical cord: the role of coiling in solute and heat transfer, Journal of The Royal Society Interface, 22(30), Published 24 September 2025, https://doi.org/10.1098/rsif.2025.0148
spiral = greater surface area