How Does Food Move in My Body?
Tardigrade
Tardigrade
Tardigrades, often called water bears or moss piglets, are near-microscopic animals with long, plump bodies and scrunched-up heads. They have eight legs, and hands with four to eight claws on each. While strangely cute, these tiny animals are almost indestructible and can even survive in outer space.
The tardigrade species newly named Macrobiotus shonaicus (after the Shonai region of Japan where it was discovered) has a talent for growing under lab conditions. That allowed genome biologist and tardigrade fan Kazuharu Arakawa to capture water bear home movies. Here, M. shonaicus trundles along with its almost bearlike gait. In an event rarely shown on film, it excretes waste almost its body size.
From Molecules to Organisms