Most animals have trilateral symmetry, allowing them to see in all directions. Most plants in the Smoke Ring are quite fragile, as they don't have to support their own weight. A notable exception to this rule are the Integral Trees. These are trees that are up to 100 kilometers long. Tidal locking causes them to be oriented radially, with one end pointing in toward Voy and one end pointing out. The ends of the tree experience a tidal force of up to 1/5 "g". Each end consists of a leafy "tuft", which is where photosynthesis occurs.