Researchers in Kenya and worldwide are seeking new ideas for ventilation systems
So the researchers wanted to see whether the same was true in mice, rats and pigs common animal subjects new ideas are tested on humans. Also, we know that [parts] of the rectum are suitable for drug or nutrient absorption, Takebe said.
The rectum can serve as a route to administer drugs or fluids, which are then absorbed by blood vessels and flow into the body s circulatory system.
Oxygenation like an enema
The researchers injected oxygen through the rectums of anesthetized mice in an oxygen-deprived environment, using an enemalike procedure.
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Swifts aren t called swifts for nothing. They re known for being among the fastest migrating small birds around. When they aren t breeding, common swifts stay in the air most of the time up to 10 months of the year. Scientists had thought they travel about 500 kilometers per day on average. Now, new evidence reported in the journal
iScience on May 20 shows that s a conservative estimate.
According to new tracking data, common swifts travel 570 kilometers (more than 350 miles) on an average day but they are capable of going much farther and faster. The maximum recorded distance in the study was more than 830 kilometers (more than 500 miles) per day over nine days.
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They got the idea from aquatic creatures like sea cucumbers and catfish, which can take in oxygen through their intestines. But before shoving a hose up anyone s rear, they had to find out whether it could even work in mammals.
First up were mice. Mice subjected to an environment with lethally low levels of oxygen without the ability to breathe through their bums died within minutes, but three-quarters of those with a specially designed intestinal gas ventilation system made it almost an hour.
But that system wouldn t work on people, because it requires abrasion of the intestinal muscosa - the crucial layer that protects the rest of our body from whatever gross stuff we ve consumed that shouldn t really be there. So the scientists created a liquid version using perfluorochemicals, which seemed to work on pigs.