Paranasal Sinuses, air-filled, mucus-lined cavities in the head and cheekbones that drain into the nasal cavity. The largest are the two maxillary sinuses found directly under the eye sockets. Others are the two frontal sinuses, found in the frontal bone just above and between the eye sockets, and the sphenoid and ethmoid sinuses, located deeper in the skull over the nasal cavity. The sinuses produce mucus, which is propelled by small, hairlike processes called cilia into the nasal cavity. Their function is not clearly understood, but they are believed to help warm and moisten inhaled air.
Online Encyclopedia Blog For Kid's Research In Sciences, Health, Environment and Technology
Popular Posts
-
Cellular Respiration, process in which cells produce the energy they need to survive. In cellular respiration, cells use oxygen to break d...
-
Sense Organs, in humans and other animals, faculties by which outside information is received for evaluation and response. This is accompli...
-
. Respiratory System, in anatomy and physiology, organs that deliver oxygen to the circulatory system for transport to all body cells. Oxyge...
-
Reproductive System, term applied to the group of plant or animal organs that are necessary for or that are accessory to the reproductive pr...
-
Hypothalamus, part of the brain, important in regulating the internal activities of the body. Although the hypothalamus constitutes less th...