To avoid serious symptoms, spend time in sunlight and eat foods that are good sources of vitamin D, including milk, eggs, fish oil, mackerel, sardines, canned salmon, tuna, soy, seaweed, broccoli, molasses, legumes, beans, almonds and oranges.
Leaves, stems, roots, and flowers are all made up of various tissues. Plant Tissues Plant Tissues fall into two large categories: Meristematic, or Permanent (Non-Meristematic) Meristematic Tissues Meristems are places in plants where cell division is occurring. During cell division, one cell becomes two cells.Each new cell can also divide.lant Tissues Plant Tissues fall into two large categories: Meristematic, or Permanent (Non-Meristematic) Meristematic Tissues Meristems are places in plants where cell division is occurring. During cell division, one cell becomes two cells. Each new cell can also divide.
1 Sclerenchyma tissues are thick-walled support cells found throughout the plant as fiber. 2  Xylem is a structurally complex tissue that conducts water and nutrients from the roots to all parts of the plant. 3  The xylem is comprised of a series of long tubes made up of shorter vessel members.