How is tree sap created?

Tree sap is created through a process where trees produce a sugary fluid known as xylem sap, which is essential for transporting nutrients and water from the roots to the leaves. When a tree undergoes photosynthesis, it generates glucose, which is then dissolved in water absorbed from the soil. This mixture travels upward through the xylem, and when the tree is injured or during certain seasons, the sap can flow out as a protective response. Additionally, some trees produce resin, a thicker substance that helps seal wounds and deter pests.