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.
Oleanders are a bushy, woody flowering plant commonly used in landscapes for screening due to their tall growth habit. Growing tall oleanders in any environment requires fertilizer, water and proper pruning. Oleanders grow best in the tropical climates of the West Coast and southern states such as Texas and Florida.