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.
Olea europaea 'Manzanillo' (Olive) - An evergreen (ever gray) tree growing to 30 feet tall by 25 feet wide with gray bark and leathery gray narrow leaves. As with other olives it produces small pollen-rich white flowers in spring and fruit develops through summer into fall. The fruit on this variety is of medium size (about 1 inch long) and is prized for making good quality black olives and with enough oil for pressing oil. Plant in full sun in a well-drained soil.