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.
CSF or cerebrospinal fluid is the fluid that occupies the subarachnoid space and ventricular system in which the human brain and spinal cord is located.One of its main functions is involved in the transfer of substances in and around the central nervous system.ajority of CSF or cerebrospinal fluid is formed inside the choroid plexus of the brain through the ependymal cells. Some are produced through the blood vessels that are present in the ventricular walls.