Stem covered in bark

A stem covered in bark refers to the outer protective layer of a tree or woody plant, which serves to safeguard the inner tissues from environmental factors, pests, and diseases. Bark consists of two main layers: the outer bark, which is dead and serves primarily as protection, and the inner bark (or phloem), which is alive and responsible for transporting nutrients. This structure plays a crucial role in the overall health and growth of the plant, allowing it to thrive in various conditions. Additionally, the texture and color of bark can vary widely among different species, contributing to the visual diversity of forests and landscapes.