Across
- 3. supporting filaments of gills
- 5. blood that has high partial pressure of oxygen leaves through
- 7. diffuses out from the lung capillaries and into the alveolus before it is expelled into the atmosphere through the nose and mouth.
- 9. Oxygen combines with haemoglobin in erythrocytes to form
- 10. human respiratory surface
Down
- 1. small pores in the thorax and abdomen of insects
- 2. 70 percent of carbon dioxide is carried in the form of
- 4. floor of buccopharyngeal during inhalation of frog
- 6. the bronchiole walls become swollen and thick
- 8. muscle of intercostal muscle contract during inhalation