What is the typical feature of epithelium? How different is it from connective tissue?

Explanation

### Step-by-Step Solution:

1. **Definition of Epithelial Tissue**: Epithelial tissue is a type of tissue that forms the coverings and linings of organs and structures throughout the body.

2. **Typical Features of Epithelial Tissue**:
- **Closely Packed Cells**: A defining characteristic of epithelial tissue is that its cells are closely packed together. This means that there is minimal to no intercellular space between the cells.
- **Cell Adhesions**: The cells in epithelial tissue are connected to each other through cell junctions, such as desmosomes. These junctions help maintain the integrity and structure of the tissue.
- **Exposure to External Environment**: Epithelial tissue is often exposed to the external environment, which requires it to have properties such as impermeability to protect underlying tissues.
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