3/16 The sap is the blood of the tree. The bark is the skin of the tree. When the bare place heals over, an ugly scar will be left. The Cuticle.~--Our bodies, like trees, have two skins, or really one skin with an outer and an inner layer. When a person burns himself so as to make a blister, the outer skin, called the _cuticle_, is separated from the inner by a quantity of water or serum poured out from the blood. |