Pith: The Main of your trunk and the first source of nourishment for your young plant. Pith, also known as medulla, constitutes a delicate, porous tissue inside the stems of vascular plants. It is comprised of sensitive cells referred to as parenchyma, which serve to retail outlet and Express nutrients. https://succeedinlife.co.uk/the-ultimate-guide-to-choosing-the-best-cat-tree-scratcher/