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.
Root Growth Habit. Because oleanders have a wide soil pH range of 5 to 8.3, their fibrous roots extend well past the shrub's drip line in search of moisture, nutrients and oxygen. Growing up to 18 feet tall and 15 feet wide, oleanders thrive in full sunlight locations where soil does not become soggy.igging the oleander from the ground by hand is extremely difficult because of the dense root system; cutting through roots with a sharp shovel takes a lot of strength.