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4 Written questions

3 Multiple choice questions

  1. A poisonous substance, especially a protein, that is produced by living cells or organisms and is capable of causing disease
  2. a cell, group of cells, or organ producing a release of hormones
  3. the colorless watery fluid of the blood that contains no cells, but in which the blood cells are flowing freely (suspended)

3 True/False questions

  1. Hearta hollow, pumplike organ of blood circulation, composed of smooth muscle, located in the chest between the lungs and slightly to the left, it contains four chambers


  2. Diffusionsynonim for circulation, distributing blood thoughout the body


  3. Valvestructure that controls the flow of a fluid, for example it permits blood to flow in one direction only


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