From the outside of a muscle coming in, the first thing encountered would beMultiple Choicefascia.fascicle.dense connective tissue.muscle fiber.myofibril.

To identify the first structure encountered from the outside of a muscle coming inward, let's analyze the options provided:

1. Fascia: This is a connective tissue that surrounds muscles and groups of muscles. It is located outside the muscle.

2. Fascicle: This is a bundle of muscle fibers. It is surrounded by a layer known as perimysium, which is deeper than the fascia.

3. Dense connective tissue: This refers to the tissue that may comprise tendons and ligaments but is not a specific layer in muscle anatomy.

4. Muscle fiber: This is the individual muscle cell and is encased in a layer known as endomysium.

5. Myofibril: This is the internal structure of a muscle fiber, consisting of long strands of proteins (actin and myosin) and is located even deeper within the muscle fiber itself.

Conclusion

Based on this breakdown, the first structure encountered from the outside of a muscle coming in is fascia. Therefore, the correct answer is fascia.