Define ground tissue. What are their functions?

Explanation

### Step-by-Step Solution

**Step 1: Definition of Ground Tissue**
Ground tissue is a type of plant tissue that forms the main bulk of the plant body. It encompasses all the tissues in a plant except for the epidermis (the outer protective layer) and the vascular bundles (which include xylem and phloem).

**Step 2: Origin of Ground Tissue**
Ground tissue is partially derived from two types of meristematic tissues:
- **Parenchyma**: This is the primary tissue from which ground tissue is derived.
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