3D images of sharks' spiraled intestines reveal they work like Nikola Tesla's one-way valve - Daily Mail 23-Jul-2021

3D images of sharks' spiraled intestines reveal they work like Nikola Tesla's one-way valve - Daily Mail

3D images of shark intestines show the spiral-shaped organs slow the movement of food and direct it downward through the gut, all of which is done through the use of gravity.

More...