Levels of organisation.

Edit Answers
1234567
Across
  1. 2. the basic unit of life
  2. 4. the system that breaks food down and absorbs the food into the blood
  3. 5. a group of different tissues that work together to perform a certain function
  4. 7. the system which transports oxygen and nutrients to the rest of the body using blood
Down
  1. 1. the system that takes oxygen from the air and puts it into the blood
  2. 3. a group of cells the work together to perform a certain function
  3. 5. a group of organ systems working together
  4. 6. system a group of organs working together to perform certain functions