Tree sap, also known as plant sap, is a natural fluid found in the transport tissues of certain plants. This viscous substance serves as a nutritious source of energy and protection against pests and diseases for trees and other plants. Interestingly, tree sap is also a common ingredient in various industries, including medicine, food, and cosmetics. Synonyms for tree sap include plant juice, resin, gum, pitch, and balsam. Each of these terms refers to different types of secretions that trees and plants produce. For instance, resin is a sticky substance that flows out of certain trees, while balsam is a fragrant liquid found in certain evergreens.