Question
Complete the table:





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| Organ systems | Organs | Functions |
| 1. Respiratory system | ||
| 2. Circulatory system |




| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | ……… | No change | ……… | |
| 2. | ……… | ……… | Orange colour turns red | |
| 3. | Red litmus turns blue | ……… | ……… | |
