Hierarchical organization of interacting systems in a human body

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Across
  1. 1. What goes in must come out.
  2. 3. What system of Mohammed Ali stopped working properly.
  3. 4. Which system does the coronavirus attack first?
  4. 6. The shogun is above the Emporer in Japanese history because of the what?
  5. 7. ប្រព័ន្ធដែលប្រឆាំងនឹងភ្នាក់ងារបង្កជំអឺ
  6. 9. What is one of the most common organs you see on spooky day?
  7. 10. What system do you use when u answer the call of nature?
  8. 11. 如果你想成为一个有男子气概的男人,你必须训练什么?
  9. 12. When you make a call you use a ___-phone.
Down
  1. 2. What system do short people need?
  2. 5. Basketball player Wilt Chamberlain died because this system stopped.
  3. 8. 如果我们要有孩子我们要用什么?