1 Tuberculous pleuritis may occur in some people who have the lung disease from tuberculosis.  The pleural disease occurs from the rupture of a diseased area into the pleural space, the space between the lung and the lining of the chest and abdominal cavities.
The root apical meristem is a region of growth tissue near the tip of each root. The meristematic cells in this region grow in two directions, both backward toward the above-ground shoot and forward toward the tip of the root.
Meristems can be, and usually are, at the growing tips of the plants, where they are called apical meristems. Most plants add new cells from the tips out, not evenly all over and not from the bottom up - in the other parts of the plant, the cells grow but do not divide.