Medical Science-Santanu

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Across
  1. 3. The study of the structure of the human body
  2. 5. A gas essential for respiration
  3. 6. The basic unit of the nervous system
  4. 7. A substance that stimulates the immune system to fight disease
Down
  1. 1. The protein in red blood cells that carries oxygen
  2. 2. A microorganism that causes disease
  3. 4. A hormone used to regulate blood sugar levels