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
Remove any leaves or tissue that appear to be dead. Then dust the dry base of the plant with rooting powder and replant it in a pot with a drainage hole. Give aloe bright light, and keep it on the dry side. If you want to use a beautiful pot that has no drainage hole, drill a hole for drainage, or use it as a cachepot. Tuck your plant into a plain plastic pot that can fit inside the eye-catching container. Elevate the inner pot on 1/2 inch of pea gravel.