Educational worksheet for identifying muscles in the human body.

Let's solve this muscular system labeling task step by step.

We are given a list of muscles and two figures: one showing the front of the human body and one showing the back. We need to match each muscle name to its correct location on the body.

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✔ List of Muscles Provided:

- dorsals
- quadriceps
- gluteus
- triceps
- biceps
- facial muscles
- deltoids
- frontalis muscle
- abdominals
- pectorals
- calf muscles
- trapezius

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Now, let’s identify where each muscle is located based on the diagrams.

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🔹 Front View (Left Figure):

1. Face (around eyes and forehead) → frontalis muscle
- The frontalis muscle is in the forehead area, responsible for raising the eyebrows.

2. Face (cheeks, lips, around mouth) → facial muscles
- These control facial expressions.

3. Upper chest / shoulder area → pectoralis (pectoral muscles)
- Large muscles in the chest that help move the arms.

4. Upper arm (front side) → biceps
- Located on the front of the upper arm; bends the elbow.

5. Abdomen (stomach area) → abdominals
- Muscles in the stomach region (rectus abdominis).

6. Thighs (front of legs) → quadriceps
- Four muscles on the front of the thigh.

7. Lower leg (back of calf) → calf muscles
- But wait — the calf muscles are on the back of the lower leg. However, in the front view, the lower leg shows the anterior part. So calf muscles would not be visible from the front unless the diagram shows them.

But looking at the lines pointing to the back of the lower leg — actually, in the front view, there's a line pointing to the lower leg, but it's likely the calf muscles are being shown from the front? That doesn't make sense.

Wait — let's analyze carefully.

Looking at the front figure, the lines go:

1. Face (forehead) → frontalis muscle
2. Face (jaw/cheeks) → facial muscles
3. Chest → pectoralis
4. Upper arm (front) → biceps
5. Abdomen → abdominals
6. Thigh → quadriceps
7. Lower leg → calf muscles? But calf muscles are posterior.

Wait — calf muscles are on the back of the lower leg, so they should appear on the back view, not the front.

So perhaps the lower leg on the front is showing quadriceps already? No, quadriceps are on the thigh.

Let’s re-express:

The front has:
- Face (forehead) → frontalis
- Face (mouth/cheeks) → facial muscles
- Chest → pectoralis
- Upper arm (front) → biceps
- Abdomen → abdominals
- Thigh (front) → quadriceps
- Lower leg (front) → ??? — but calf muscles are on the back, so this can’t be.

Wait — maybe the lower leg on the front is pointing to the tibialis anterior or something else? But we don’t have that name.

Ah! Wait — the calf muscles are on the back of the leg, so they should be labeled on the back view.

But in the front view, the last box points to the lower leg — but that might be a mistake?

Let’s look at the back view.

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🔹 Back View (Right Figure):

1. Neck and upper back → trapezius
- A large triangular muscle from the neck down to the mid-back.

2. Upper back (between shoulder blades) → dorsals
- Refers to latissimus dorsi, often called "lats" — broad muscles on the back.

3. Shoulder (top of shoulder) → deltoids
- Deltoid muscles cover the shoulder joint.

4. Buttocks → gluteus
- Gluteal muscles form the buttocks.

5. Back of upper arm → triceps
- Three-headed muscle on the back of the upper arm.

6. Back of lower leg → calf muscles
- Gastrocnemius and soleus — on the posterior lower leg.

So now we can map:

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✔ Final Matching:

#### 🟩 Front View (Left Figure):

1. Face (forehead) → frontalis muscle
2. Face (jaw/cheeks) → facial muscles
3. Chest → pectoralis
4. Upper arm (front) → biceps
5. Abdomen → abdominals
6. Thigh (front) → quadriceps

> Wait — there are 6 boxes on the front, and 6 labels above the front figure.

But calf muscles are not on the front — they’re on the back.

So the last box on the front (pointing to the lower leg) must be something else?

Wait — perhaps the lower leg on the front is not calf muscles? But we don’t have another label for the lower leg.

Let’s count:

Muscle names: 12 total

Boxes:
- Front: 6 boxes
- Back: 6 boxes
→ Total 12 → matches.

So all muscles will be used.

Now, let’s assign based on anatomy:

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✔ Correct Labeling:

#### Front View (Left Figure):

1. Forehead (face) → frontalis muscle
2. Facial area (mouth, cheeks) → facial muscles
3. Chest → pectoralis
4. Upper arm (front) → biceps
5. Abdomen → abdominals
6. Thigh (front) → quadriceps

✔ All good.

Now, calf muscles must be on the back, since they are on the posterior of the lower leg.

But what about the deltoids? They are on the shoulder, both front and back — but the deltoid is visible on both views.

Let’s look at the back view:

#### Back View (Right Figure):

1. Upper back (neck to shoulder) → trapezius
2. Mid-back (between shoulder blades) → dorsals (latissimus dorsi)
3. Shoulder (top) → deltoids
4. Buttocks → gluteus
5. Back of upper arm → triceps
6. Back of lower leg → calf muscles

Wait — but deltoids are also on the front — but only one label per muscle.

So if deltoids are labeled on the back, then they must be pointing to the deltoid on the back of the shoulder.

But the deltoid is a single muscle that wraps around the shoulder — so it's visible from both sides.

But in this diagram, the deltoid is likely pointed to on the back view, as the upper arm area.

Similarly, triceps is on the back of the arm, so back view.

And biceps is on the front, so front view.

So here’s the final mapping:

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✔ Final Answer:

#### Front View (Left Side):

1. Forehead → frontalis muscle
2. Face (jaw/cheeks) → facial muscles
3. Chest → pectoralis
4. Upper arm (front) → biceps
5. Abdomen → abdominals
6. Thigh (front) → quadriceps

#### Back View (Right Side):

1. Upper back (neck to shoulder) → trapezius
2. Mid-back (between shoulder blades) → dorsals
3. Shoulder (top) → deltoids
4. Buttocks → gluteus
5. Back of upper arm → triceps
6. Back of lower leg → calf muscles

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❗ Important Note:

- Deltoids are on both front and back, but since the back view shows the posterior aspect, it's labeled there.
- Biceps is only on the front of the arm.
- Triceps is only on the back of the arm.
- Calf muscles are only on the back of the lower leg.

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✔ Summary Table:

| Location | Muscle Name |
|--------|-------------|
| Front – Face (forehead) | frontalis muscle |
| Front – Face (cheeks/mouth) | facial muscles |
| Front – Chest | pectorals |
| Front – Upper arm (front) | biceps |
| Front – Abdomen | abdominals |
| Front – Thigh (front) | quadriceps |
| Back – Neck/upper back | trapezius |
| Back – Mid-back | dorsals |
| Back – Shoulder | deltoids |
| Back – Buttocks | gluteus |
| Back – Upper arm (back) | triceps |
| Back – Lower leg (back) | calf muscles |

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✔ Final Answer (as per image):

#### Front (Left Figure):
1. frontalis muscle
2. facial muscles
3. pectorals
4. biceps
5. abdominals
6. quadriceps

#### Back (Right Figure):
1. trapezius
2. dorsals
3. deltoids
4. gluteus
5. triceps
6. calf muscles

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This completes the labeling correctly based on human anatomy.