Bark is a tree’s skin. It is tough and hard and protects the soft, inside part of the tree. A tree trunk grows from the inside out. Each year, a ring of new, soft wood grows around the trunk,…
Why tree-line trees are short Every winter, snow covers the trees that grow near the tree line on mountains. The snow is about as deep one winter as the next. When a tree is young, snow covers it…
Laryngitis is an inflammation of the larynx (the organ in the throat that contains the vocal cords). A baby with laryngitis may be hoarse. An older child with this condition will have definite…
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