Systems & Diseases

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Across
  1. 4. breathe out
  2. 5. The process of breathing and exchanging gases.
  3. 7. Pulse The regular throbbing of blood vessels as blood is pumped through them.
Down
  1. 1. A type of pathogen that's smaller than bacteria.
  2. 2. The muscular organ that pumps blood throughout the body.
  3. 3. Red fluid that carries oxygen and nutrients in the body.
  4. 6. an internal organ, also known as the windpipe; it is part of the respiratory system.
  5. 8. Organs where gas exchange occurs in the body.