HUMANS AND MICROBES

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Across
  1. 3. - this is the most complex organ in our body.
  2. 4. - organism which are invisible to the naked eye
  3. 7. - something the world waited a long time to get in times of COVID
Down
  1. 1. - if you do not fall sick often, you have strong....
  2. 2. - a bacteria that makes us excrete very often.
  3. 5. cord - what keeps us straight and standing.
  4. 6. - 2 sponge like organs protected in a cage