In cardiac muscles , the cells are connected to each other by

Options

A. myofilaments
B. sarcomeres
C. intercalated discs
D. Z line

Answer

**Step-by-Step Solution:**

1. **Understanding Cardiac Muscle Structure**: Cardiac muscles are specialized muscle tissues found in the heart. They are unique compared to skeletal and smooth muscles.

2. **Identifying the Components**: In cardiac muscles, the cells (cardiomyocytes) need to communicate and work together efficiently to pump blood.

3. **Exploring the Options**:
- **Myofilaments**: These are the filaments (actin and myosin) that make up the sarcomeres and are responsible for muscle contraction but do not connect the cells.
- **Sarcomeres**: These are the structural units of a muscle and are involved in contraction, but they do not connect individual muscle cells to one another.
- **Intercalated Discs**: These are specialized structures that connect cardiac muscle cells. They contain gap junctions and desmosomes, allowing for communication and mechanical coupling between cells.
- **Z-line**: This is part of the sarcomere and does not connect cardiac muscle cells to each other.

4. **Conclusion**: The cells in cardiac muscles are connected to each other by **intercalated discs**. These structures allow for synchronized contraction of the heart muscle.

5. **Final Answer**: The correct answer is **intercalated discs**.

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