Thin walled cells with much intercellular spaces and without pigments are known as ......

Explanation

**Step-by-Step Solution:**

1. **Understanding the Characteristics of the Cells:**
- The question describes cells that are thin-walled, have much intercellular space, and lack pigments.

2. **Identifying the Type of Cells:**
- Thin-walled cells typically refer to cells that do not have a thick secondary wall, which is characteristic of certain plant tissues.
- The presence of intercellular spaces indicates that these cells are not tightly packed, allowing for gas exchange and storage.
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