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.
While it can reach twenty feet, oleander takes well to pruning and is typically kept at six to ten feet. Tolerant of dry soils and hot sun, oleander is an excellent plant for the desert, but can thrive in warm, humid climates as well. Growing Requirements for Oleander. For the best flowering, plant oleanders in full sun, but in very hot climates they bloom more reliably in light shade. Oleanders tolerate a range of soil conditions, from dry sandy soils to moist clay soils.