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Quiz: Categories of Cancer

  1. Cancers are always named according to the organ in which they arise. However, when a cancer metastasizes to another part of the body, it is named according to the secondary site.
  2. No matter how sophisticated human life seems to be, it all starts with a single, newly fertilized cell.
  3. The process known as differentiation takes place before the formation of an embryo.
  4. In the process of differentiation, two germ layers, ectoderm and endoderm, are formed and then a third middle layer, called "mesoderm", starts developing.
  5. Tissues are made up of cells that are similar in structure and perform the same functions.
  6. The body tissues and organs develop from the three germ layers. For example, some epithelial tissue is derived from ectoderm and connective tissues are derived from mesoderm.
  7. Sarcoma refers to a malignant neoplasm of epithelial origin or cancer of the internal or external lining of the body.
  8. Most of the cancer cases in the world are carcinomas.
  9. The term "lung cancer" indicates not only where the cancer originates, but also exactly what kind of tissue is involved.
  10. Skin cancer is one of the common types of cancers named for its primary site.