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12345678
Across
  1. 3. Number of bones in the human body (2 in the hundreds place, 0 in the tens place).
  2. 5. Average heartbeats per day (1 in the hundred-thousands place, smallest odd number is 1).
  3. 7. Length of blood vessels in the human body in kilometers (10 in the ten-thousands place, 0 in the hundreds place).
  4. 8. Length of the small intestine (7 in the hundreds place, 0 in the ones place).
Down
  1. 1. Weight of the human brain (4 in the hundreds place, 2 in the tens place).
  2. 2. Number of hair follicles on the scalp (9 in the ten-thousands place, 0 in the ones place).
  3. 4. Average skin surface area (2 in the ten-thousands place, 0 in the thousands place).
  4. 6. Liters of blood pumped by the heart each day (7 in the thousands place, 0 in the hundreds place).
  5. 8. 1