Fill in the blanks appropriately
`{:(" Organ","Excretory wastes"),((a)" Kidneys",............................),((b)" Lungs",............................),((c)" Liver",............................),((d)" Skin",............................):}`

Explanation

To fill in the blanks appropriately, we need to identify the excretory wastes associated with each organ listed. Here’s the step-by-step solution:

1. **Kidneys**: The primary function of the kidneys is to filter blood and produce urine. Therefore, the excretory waste from the kidneys is **urine**.
- **Fill in the blank**: (a) "Kidneys", **urine**.

2. **Lungs**: The lungs are responsible for gas exchange. They excrete carbon dioxide, which is a waste product of cellular respiration. Therefore, the excretory waste from the lungs is **carbon dioxide**.
- **Fill in the blank**: (b) "Lungs", **carbon dioxide**.

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