Pulmonary embolism is the sudden blockage of a major blood vessel (artery) in the lung, usually by a blood clot . In most cases, the clots are small and are not deadly, but they can damage the lung. But if the clot is large and stops blood flow to the lung, it can be deadly.
The term chiaroscuro (from the Italian words chiaro, meaning light, and scuro, meaning dark) refers to the use of light and shade in a work of art to define three-dimensional objects. Masters of this technique were the Italians Leonardo da Vinci and Caravaggio and the Dutch painter Rembrandt.
The term early broadened in meaning to cover all strong contrasts in illumination between light and dark areas in art, which is now the primary meaning. Chiaroscuro modelling La Fornarina by Raphael, shows delicate modelling chiaroscuro in the body of the model, for example in the shoulder, breast, and arm on the right.