Human Body and Physical Activity

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Across
  1. 2. each muscle fibre consists of a mass of protoplasm
  2. 3. a system that is a network of glands and organs, which produce and release hormones
  3. 6. blood consists of a liquid intracellular substance
  4. 8. process of interchange of O2 and CO2 between the organism and the environment
Down
  1. 1. a system responsible for eliminating waste from the body
  2. 2. fibre or cell is covered by a thin membrane
  3. 4. muscles responsible for the movement of the body and is in our control
  4. 5. muscles make up the mass of the heart and are responsible for the rhythmic contractions and are also not in our control control
  5. 7. carries oxygen and nutrients to the different parts of our body
  6. 9. muscles found in the walls of blood vessels, intestines, and stomach, and are not under our control