cochlear canaliculus a small canal in the petrous part of the temporal bone that interconnects the scala tympani with the subarachnoid space; it houses the perilymphatic duct and a small vein. dental canaliculi minute channels in dentin, extending from the pulp cavity to the overlying cement and enamel.
Lung infarction. Lung infarction, death of one or more sections of lung tissue due to deprivation of an adequate blood supply. The section of dead tissue is called an infarct. The cessation or lessening of blood flow results ordinarily from an obstruction in a blood vessel that serves the lung.
These sacs, known as alveoli (al-VEE-o-lye), are where oxygen is transferred to the blood, which carries it to all parts of the body. When someone has pneumonia, the lung tissue becomes inflamed and the alveoli fill with mucus * and other debris, making it difficult for oxygen to be transferred. When normal amounts of oxygen cannot reach the body's cells, many symptoms may develop. Bacteria or viruses usually cause pneumonia.