What is the purpose of the cellular junctions in the intercalated discs?

Explanation

**Step-by-Step Solution:**

1. **Understanding Intercalated Discs**: Intercalated discs are specialized structures found in cardiac muscle tissue that connect individual heart muscle cells (cardiomyocytes).

2. **Types of Cellular Junctions**: Intercalated discs contain several types of cellular junctions, primarily desmosomes and gap junctions. Desmosomes provide strong adhesion between cells, while gap junctions facilitate communication.

3. **Function of Desmosomes**: The desmosomes in intercalated discs hold adjacent cardiac muscle cells together firmly. This strong adhesion is crucial because the heart experiences significant mechanical stress during contraction.

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