Those bits of wood that come with a canvas are called canvas keys, and are for ensuring the canvas remains tight. Photo Â© Marion Boddy-Evans.Licensed to About.com, Inc.f youâve bought an unprimed ready-made canvas, or are stretching your own, donât use keys until after youâve primed the canvas, as priming makes the it more rigid. Some canvases are made with rigid corners, without the option of hammering in a wedge or key.
meâ¢tasâ¢taâ¢sis. a. the spread of disease-producing organisms or of malignant or cancerous cells to other parts of the body by way of the blood or lymphatic vessels or membranous surfaces. b. the condition produced by this. metastasis metÃ¡stasis a. Changing see -, meta ]. stasis
Metastasis is the spread of cancer cells to new areas of the body (often by way of the lymph system or bloodstream). A metastatic cancer, or metastatic tumor, is one which has spread from the primary site of origin (where it started) into different area(s) of the body.hen the cancer has spread to other parts of the body, it is called metastatic cancer. The liver, lungs, lymph nodes, and bones are common areas of spread or metastasis. Even when cancer spreads to a new location, it is still named after the area of the body where it started.