The process of removal of waste substances from the bodies of living organisms is known as _____

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the process of removing waste substances from the bodies of living organisms.

2. **Identifying the Process**: The process of waste removal is a vital function in living organisms. It ensures that harmful substances do not accumulate in the body.

3. **Recognizing the Term**: The correct term for this process is "excretion." Excretion is a biological process that involves getting rid of excess or toxic substances from the body.

4. **Examples of Excretion**:
- The kidneys filter waste products like urea, uric acid, and ammonia from the blood, which are then excreted in urine.
- The lungs excrete carbon dioxide, a waste product of respiration.
- The skin helps in excretion through sweat, which removes certain waste products.

5. **Functions of Excretion**: Excretion not only removes waste but also regulates the balance of ions, water content, and pH levels in the body.

6. **Final Answer**: Therefore, the process of removal of waste substances from the bodies of living organisms is known as **excretion**.

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