Educational worksheet illustrating the human muscular system with labeled muscle groups.

Let’s solve this step by step.

We are matching muscle names to the correct boxes on the body diagram. The muscles listed are:

- PECTORAL
- BICEPS
- ABS
- QUADRICEPS
- CALF

Now, let’s think about where each muscle is located on the human body:

1. Pectoral – This is the chest muscle. It’s across the upper front of the torso. So it should go in the box pointing to the chest area (top left box on the figure).

2. Biceps – This is the front part of the upper arm. When you flex your arm, that’s the bicep bulging. So it goes in the box pointing to the upper arm (right side, middle-upper box).

3. ABS – Short for abdominal muscles. These are the “six-pack” muscles in the stomach area. So it goes in the box pointing to the belly/midsection (center box, below chest).

4. Quadriceps – These are the big muscles on the front of the thigh. They help you kick or stand up. So it goes in the box pointing to the front of the thigh (left side, lower box near knee).

5. Calf – This is the back of the lower leg, below the knee. It helps you push off when walking or running. So it goes in the box pointing to the lower leg (right side, bottom box).

Now let’s assign them correctly based on position:

→ Top left box (chest) = PECTORAL
→ Right middle-upper box (upper arm) = BICEPS
→ Center box (belly) = ABS
→ Left lower box (thigh) = QUADRICEPS
→ Right bottom box (lower leg) = CALF

Final Answer:
Top left box: PECTORAL
Right middle-upper box: BICEPS
Center box: ABS
Left lower box: QUADRICEPS
Right bottom box: CALF