Lekha

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Across
  1. 4. of plants making food – Photosynthesis
  2. 5. that speeds reactions – Enzyme (moved here to balance counts)
  3. 7. that restores heart rhythm – Pacemaker
  4. 9. measured in joules – Energy
  5. 11. study of blood – Hematology
  6. 12. that regulates blood sugar – Insulin
  7. 13. produced when skin is exposed to sunlight – Vitamin D
Down
  1. 1. of electrical signal with fixed amplitude – Analog
  2. 2. separating chest and abdomen – Diaphragm
  3. 3. responsible for fight-or-flight – Adrenaline
  4. 4. that speeds reactions – Enzyme
  5. 6. used in cancer therapy – Gamma Rays
  6. 8. with zero electrical resistance at low temperatures – Superconductor
  7. 10. that fights pathogens – Antibody