Sloths possess a symbiotic relationship with the algae that grows on their fur. While the sloth provides the algae with shelter and water (as sloth fur is highly absorbent), the algae provide the sloth with camouflage as well as extra nutrients through their skin.
There are two types of sloth, two-toed and three-toed.
The impressive biology of a sloth allows it to spend 90% of its life hanging upside down. Studies show that this is made possible because their organs are attached to their rib cage, which means they don’t weigh down on the lungs. This means that, unlike us, a sloth can hang upside down with no affect on its breathing.
Credits:
Created with images by WikiImages - "pygmy sloth sloth bradypus pygmaeus" • SCPotter1948 - "sloth animal wildlife" • RalfDesign - "sloth sleeping animal" • RoyBuri - "graffiti art sloth" • lila_getupft - "sloth mammal animal" • Lutralutra - "sloth lazy mammal"