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.
The physical changes or causes are airway obstruction by thick mucus or by poor lung tissue compliance (the elasticity, or ability of the lung tissue to expand) that can either block air from entering the alveoli or by not permitting the alveoli to expel CO2 because the elastic tissue becomes nonfunctional.