The umbilical cord evolved and elongated for specific physiological reasons

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that the umbilical cord evolved and elongated for specific physiological reasons?

Yes. Recent evidence supports the physiological and evolutionary significance of the umbilical cord's structure and length, linking its dimensions to critical functions such as thermal regulation and gas diffusion.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked 4 Aug 2026

The analysis

The retrieved literature (specifically papers [5] and [10]) provides direct empirical evidence that the umbilical cord's length and structural configuration evolved and serve specific adaptive physiological functions, including thermal regulation, gas exchange, and buffering against fetal acidosis. Therefore, the claim is supported.

Evidence for · 2

Umbilical cord structure shapes feto-maternal heat exchange across mammals

2025

This study demonstrates that umbilical cord structure and length vary across mammals and play an adaptive role in thermal regulation and physiological function relative to birth weight.

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Wan, T., Laundon, D., Saw, S., Cheng, N., Lee, H. K., Johnstone, E. D., Jensen, O. E., Lewis, R. M., & Chernyavsky, I. (2025). Umbilical cord structure shapes feto-maternal heat exchange across mammals. doi.org. https://doi.org/10.1101/2025.11.18.688874

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More for · 1

Ex-vivo evidence of the human umbilical cord as a physiological buffer against fetal acidosis.

2025

This study shows that umbilical cord length and structure provide specific physiological buffering mechanisms, such as facilitating gas diffusion for fetal protection against acidosis.

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Vries, I. R. d., Oei, S. G., Jagt, M. B. v. d. H. d., Dirkx, J. A., Vullings, R., Vis, J. Y., Broeren, M., & Laar, J. V. v. (2025). Ex-vivo evidence of the human umbilical cord as a physiological buffer against fetal acidosis.. doi.org. https://doi.org/10.1016/j.placenta.2025.07.007

Related receipts

Is it true that fetuses get oxygen through the placenta and umbilical cord rather than by breathing with their lungs? SUPPORTED related question, same topic

Receipt History

first checked04 Aug 2026

judged → SUPPORTED · 7804 Aug 2026

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