Part of the Arabian Desert, the Rub al-Khali, meaning âempty quarterâ in Arabic, is the largest region of continuous sand in the world, and the driest. It lies in a structural basin and stretches across an area of roughly 250,000 square miles (650,000 square kilometers.)
How do ciliates move?   Answer   Ciliates, a unicellular protozoa, use their cilia, tiny hair-like organelles, to move around. What are ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid called? Ependymal cells are cells that line the central cavities of the brain and spinal cord. They are ciliated and act as a semi-permeable lining between the cavities and normal tisâ¦sue.
range in shape from squamous to columnar, many are ciliated; they line the central cavities of the brain and the spinal cord where they make a permeable barrier betw. the cerebrospinal fluid that fills those cavities and the tissue fluid bathing the cells of the CNS; beating cilia help circulate cerebrospinal fluid.reate a free account to save it. Advertisement Upgrade to remove ads. These are vocabulary words from Chapter 11 of the Human anatomy and Physiology Book, 6th edition, by Elaine B. Marieb from the Pearson Company.