Their smooth muscle is less than arteries. Elastic fibers provide recoil which is what you need in arteries to propel the blood forward. Veins lack these which is why large amounts of blood can be stored in them without the walls providing any sort of recoil and keeping pressure low.elative to the walls of arteries, the veins' walls are thinner, because the pressure of the blood in the veins is much lower; so low in fact, that valves are required to prev â¦ ent blood in the veins flowing backwards.
The plant Agave americana, which is sometimes called American aloe, belongs to the Asparagaceae, a different family. The genus is native to tropical and southern Africa, Madagascar, Jordan, the Arabian Peninsula, and various islands in the Indian Ocean (Mauritius, Reunion, RÃ©union, comoros.). etc
History of Aloe Vera. This striking plant is native to tropical and semi-tropical regions of Africa and the Mediterranean. Aloe has been used for centuries, and mentioned by Dioscorides (one of the fathers of herbal medicine) in 78 AD and mentioned in medicinal books dating back to the 10 th century in Europe. Aloe, native to Africa, found its way to the west via trade routes from Egypt and Africa.