Mark the odd one out in the given series:
Areolar tissue, blood, neuron, tendon

Explanation

To solve the question of identifying the odd one out from the series: Areolar tissue, blood, neuron, and tendon, we can follow these steps:

### Step 1: Identify the Types of Tissues
- **Areolar Tissue**: This is a type of connective tissue characterized by a loose arrangement of fibers.
- **Blood**: Blood is also classified as a connective tissue, consisting of a fluid matrix (plasma) and various cells.
- **Neuron**: Neurons are specialized cells that make up nervous tissue and are responsible for transmitting electrical impulses.
- **Tendon**: Tendons are fibrous connective tissues that connect muscles to bones.

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