Skip to main content
U.S. flag

An official website of the United States government

Anatomy of a tree

USFS shield
This information is courtesy the Arbor Day FoundationA: The outer bark is the tree's protection from the outside world. Continually renewed from within, it helps keep out moisture in the rain, and prevents the tree from losing moisture when the air is dry. It insulates against cold and heat and wards off insect enemies.B: The inner bark, or “phloem”, is pipeline through which…
#Trees, #ArborDay