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
What Is Metastatic Cancer? The main reason that cancer is so serious is its ability to spread in the body. Cancer cells can spread locally by moving into nearby normal tissue. Cancer can also spread regionally, to nearby lymph nodes, tissues, or organs. And it can spread to distant parts of the body. When this happens, it is called metastatic cancer. For many types of cancer, it is also called stage IV (four) cancer. The process by which cancer cells spread to other parts of the body is called metastasis.