Mammals can use their intestines to breathe

Rodents and pigs share with certain aquatic organisms the ability to use their intestines for respiration, finds a study publishing May 14th in the journal Med. The researchers demonstrated that the delivery of oxygen gas or oxygenated liquid through the rectum provided vital rescue to two mammalian models of respiratory failure.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/05/210514134205.htm