Understanding Fascia
Fascia is a connective tissue that plays a crucial role in the structural integrity of the body. It surrounds muscles, organs, and nerves, providing support and protection.

Composition of Fascia
- **Collagen**: The primary component of fascia is collagen, a protein that provides strength and resilience.
- **Structural Role**: Collagen fibers are arranged in a way that allows fascia to withstand tensile forces, enabling it to maintain shape and support surrounding tissues.

Other Components
- **Elastin**: While collagen is predominant, elastin is also present in fascia, allowing for elasticity and flexibility.
- **Ground Substance**: This is a gel-like substance that fills the spaces between collagen and elastin fibers, providing hydration and nourishment to the cells.

Why Not Other Options?
- **Keratins**: These are fibrous proteins found mainly in hair, nails, and the outer layer of skin, not in fascia.
- **Microtubules**: These are components of the cytoskeleton in cells, primarily involved in cell shape and movement, rather than connective tissue structure.
- **Muscle Fibers**: Muscle fibers are specialized cells for contraction and are distinct from fascia, which serves a supportive role.

Conclusion
In summary, fascia is primarily made of collagen, which provides the necessary strength and support to maintain the body's structure. Understanding the composition of fascia is essential for grasping its functional role in the human body.