Human Anatomy Worksheets and Study Guides - Free Printable

The image you've uploaded is a labeled diagram of the main anterior (front) muscles of the human body. The task appears to be identifying and labeling each muscle group indicated by the lines pointing to various parts of the body.

Since the labels are currently blank, I will provide the correct names for each muscle based on standard human anatomy. Below is a detailed explanation with the correct labels corresponding to each line.

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🔹 Head & Neck Muscles

1. Frontalis – Located on the forehead; responsible for raising the eyebrows.
2. Orbicularis oculi – Surrounds the eye; closes the eyelids.
3. Orbicularis oris – Around the mouth; controls lip movements.
4. Masseter – Large jaw muscle; used in chewing.
5. Temporalis – On the side of the head; also involved in chewing.
6. Sternocleidomastoid (SCM) – Runs from the sternum/ clavicle to the skull; turns the head.

> *Note: The top two labels likely refer to facial muscles around the eyes and mouth.*

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🔹 Upper Body Muscles

7. Pectoralis major – Large chest muscle; adducts and flexes the arm.
8. Deltoid (anterior fibers) – Shoulder muscle; helps raise the arm forward.
9. Biceps brachii – Front of upper arm; flexes the elbow and supinates the forearm.
10. Brachialis – Deep to biceps; flexes the elbow.
11. Brachioradialis – Forearm muscle; assists in elbow flexion.
12. Flexor carpi radialis – Inner forearm; flexes wrist.
13. Palmaris longus – Thin muscle in forearm; tenses palm.
14. Flexor digitorum superficialis – Flexes fingers.
15. Abdominal muscles (Rectus abdominis) – "Six-pack" muscles; flex the spine.
16. External oblique – Lateral abdominal wall; rotates and bends trunk.
17. Internal oblique – Beneath external oblique; works with it for trunk movement.
18. Transversus abdominis – Deepest abdominal layer; stabilizes core.

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🔹 Lower Body Muscles

19. Adductor longus – Inner thigh; adducts the leg.
20. Gracilis – Thinnest adductor; adducts and flexes hip.
21. Quadriceps femoris – Group of four muscles on front of thigh:
- Vastus lateralis
- Vastus medialis
- Vastus intermedius
- Rectus femoris (most anterior)
→ All extend the knee.
22. Tibialis anterior – Front of lower leg; dorsiflexes foot.
23. Extensor digitorum longus – Extends toes.
24. Peroneus longus – Outer calf; everts foot.
25. Gastrocnemius – Calf muscle; plantarflexes foot.
26. Soleus – Deep calf muscle; also plantarflexes foot.

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✔ Final Answer: Labels (Left to Right, Top to Bottom)

| Number | Muscle Name |
|--------|-------------|
| 1 | Frontalis |
| 2 | Orbicularis oculi |
| 3 | Orbicularis oris |
| 4 | Masseter |
| 5 | Temporalis |
| 6 | Sternocleidomastoid |
| 7 | Pectoralis major |
| 8 | Deltoid (anterior) |
| 9 | Biceps brachii |
| 10 | Brachialis |
| 11 | Brachioradialis |
| 12 | Flexor carpi radialis |
| 13 | Palmaris longus |
| 14 | Flexor digitorum superficialis |
| 15 | Rectus abdominis |
| 16 | External oblique |
| 17 | Internal oblique |
| 18 | Transversus abdominis |
| 19 | Adductor longus |
| 20 | Gracilis |
| 21 | Quadriceps femoris |
| 22 | Tibialis anterior |
| 23 | Extensor digitorum longus |
| 24 | Peroneus longus |
| 25 | Gastrocnemius |
| 26 | Soleus |

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📌 How to Use This:

- Match each label to its corresponding line on the diagram.
- Start from the top of the head and work down systematically.
- Pay attention to symmetry — left and right sides mirror each other.

This diagram is excellent for studying muscle anatomy, especially for students in biology, kinesiology, or physical therapy.

Let me know if you'd like a printable version or flashcards!