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You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Trois crayons (French: [tʁwɑ kʁɛjɔ̃]; English: "three pencils") is a drawing technique using three colors of chalk: red , black (a type of schist), and white. The paper used may be a mid-tone such as grey, blue, or tan. [ 1 ]
Both the lungs and the skin serve as respiratory organs in amphibians. The ventilation of the lungs in amphibians relies on positive pressure ventilation. Muscles lower the floor of the oral cavity, enlarging it and drawing in air through the nostrils into the oral cavity. With the nostrils and mouth closed, the floor of the oral cavity is then ...
White lung syndrome, or white lung pneumonia, is getting attention after an outbreak in Ohio. ... “Our lungs are filled with air and, when you look at a normal chest X-ray, the air is black ...
Op art, short for optical art, is a style of visual art that uses optical illusions. [1] Op artworks are abstract, with many better-known pieces created in black and white. Typically, they give the viewer the impression of movement, hidden images, flashing and vibrating patterns, or swelling or warping.
Aubrey Vincent Beardsley (/ ˈ b ɪər d z l i / BEERDZ-lee; 21 August 1872 – 16 March 1898) was an English illustrator and author. His black ink drawings were influenced by Japanese woodcuts, and depicted the grotesque, the decadent, and the erotic.
Christ at Rest, by Hans Holbein the Younger, 1519, a chiaroscuro drawing using pen, ink, and brush, washes, white heightening, on ochre prepared paper. The term chiaroscuro originated during the Renaissance as drawing on coloured paper, where the artist worked from the paper's base tone toward light using white gouache, and toward dark using ink, bodycolour or watercolour.
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