Why are xylem and phloem called complex tissues? How are they different from each other?

Explanation

### Step-by-Step Solution:

1. **Definition of Complex Tissues**:
- Xylem and phloem are classified as complex tissues because they are composed of more than one type of cell. Unlike simple tissues, which consist of only one type of cell, complex tissues have a variety of cell types that work together to perform specific functions.

2. **Composition of Xylem**:
- Xylem is primarily made up of several types of cells including tracheids, xylem vessels, fibers, and parenchyma. Each of these cell types has a unique structure and function, contributing to the overall role of xylem in the plant.

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