Label the Structures of a Muscle Fiber Using Google Slides - Free Printable

Let’s solve this step by step.

We are looking at a diagram of skeletal muscle structure, from the whole muscle down to the tiny parts inside a single muscle fiber. The labels we need to fill in are:

1. The outermost layer covering the entire muscle → that’s epimysium
2. The layer surrounding each bundle of muscle fibers (called a fascicle) → that’s perimysium
3. The layer around each individual muscle fiber (cell) → that’s endomysium
4. Inside the muscle fiber, the long contractile threads → those are myofibrils
5. The membrane surrounding the muscle fiber → that’s the sarcolemma

Now let’s match them to the blank boxes in the diagram:

- The box pointing to the very outside wrap of the whole muscle → epimysium
- The box pointing to the wrap around one of the bundles (fascicles) → perimysium
- The box pointing to the wrap around a single muscle cell → endomysium
- The box pointing to the thread-like structures inside the muscle fiber → myofibril
- The box pointing to the outer membrane of the muscle fiber → sarcolemma

Also note: “Fascicle” is already labeled on the diagram as the bundle of muscle fibers — so we don’t need to put it in a blank box unless asked. But since “fascicle” is one of the options and there’s a blank near the bundle, it might be intended for that label too — but looking closely, the word “fascicle” isn’t placed yet, and one of the blanks points directly to the bundle itself. So yes — one blank should be “fascicle”.

Wait — let’s recheck the diagram layout based on standard anatomy:

From outside to inside:

Whole muscle → wrapped in epimysium

Inside, grouped into fascicles → each fascicle wrapped in perimysium

Each fascicle contains many muscle fibers (cells) → each wrapped in endomysium

Inside each muscle fiber: myofibrils, surrounded by sarcolemma (the cell membrane)

So assigning the blanks:

Top left blank (pointing to outer layer of whole muscle) → epimysium

Blank above the fascicle (bundle) → fascicle (since it’s pointing to the bundle itself)

Blank pointing to the layer around the fascicle → perimysium

Blank pointing to the layer around the single muscle fiber → endomysium

Blank pointing to the inner threads → myofibril

Blank pointing to the membrane of the muscle fiber → sarcolemma

But wait — how many blanks are there? Let’s count the empty boxes in the image description:

There are 6 empty rectangular boxes to fill.

Options given: endomysium, myofibril, fascicle, perimysium, sarcolemma, epimysium → exactly 6 terms.

Perfect.

Now mapping:

1. Box pointing to the outermost connective tissue layer of the whole muscle → epimysium

2. Box pointing to the bundle of muscle fibers (before you get to the single cell) → fascicle

3. Box pointing to the connective tissue wrapping around that bundle → perimysium

4. Box pointing to the connective tissue around the single muscle fiber → endomysium

5. Box pointing to the rod-like structures inside the muscle fiber → myofibril

6. Box pointing to the plasma membrane of the muscle fiber → sarcolemma

Yes — that matches all six.

Final Answer:
- Outermost layer of whole muscle: epimysium
- Bundle of muscle fibers: fascicle
- Layer around the bundle: perimysium
- Layer around single muscle fiber: endomysium
- Thread-like structures inside fiber: myofibril
- Membrane of muscle fiber: sarcolemma

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Final Answer:
epimysium, fascicle, perimysium, endomysium, myofibril, sarcolemma