Reabsorbtion. Occuring more commonly within the nephron system than filtration, this is a form of active transport which takes the the useful substances for the body from the tubules and places them back into the blood filled capillaries.
Oleanders are shrubs, but they are _big_ shrubs. Most of the varieties in cultivation top out at 8 to 12 feet tall and about the same width. The wild form, and some of the older cultivars used for windbreaks top out at 20 x 20 feet.
How to Grow Oleander. Photo found on Flickr, courtesy of Swami Stream. Oleander is a shrub or small tree that blooms in summer with large, striking flowers in shades of red, white, light yellow, and pink. Because of its dense branching and rapid growth rate it is a popular hedge.