Briefly explain the function of at least 4 parts of a tree trunk

Briefly explain the function of at least 4 parts of a tree trunk

• Bark

• Protect the inner tree against:
• Extreme temperature changes
• Insects, fungi and animal attack
• Moisture evaporation from the tree

• Cambium layer

  Develops cells that form bark, promotes tree growth

• Heartwood

  Storage for waste products, provides support for the tree

• Sap wood

  conveys water and mineral salts from the roots to the leaves.