ALLANTOIS VESTIGE. “The median umbilical ligament, a remnant of the urinary urachus, itself an embryonic remnant of the allantois,” (an embryonic gas exchange membrane).
https://evolution-outreach.springeropen.com/articles/10.1186/s12052-014-0012-5
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022