Fill in the missing blanks on the skeleton diagram using the provided key words.

Let’s go step by step to fill in the blanks on the skeleton diagram using the key words provided.

We’ll match each blank box to the correct bone name from the “Key Words” list. We’ll start from the top and work our way down, left side first (front view of skeleton), then right side (back view).

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Left Side (Front View):

1. Topmost arrow pointing to skull → Cranium
2. Arrow below that, pointing to collarbone → Clavicle
3. Arrow pointing to shoulder blade area (but front view — actually this is likely scapula? Wait — no, in front view, the scapula isn’t visible. Let’s check: The third box points to upper arm bone → Humerus
- Correction: Looking at typical diagrams:
- First box (top) = Cranium
- Second box (below cranium, near neck/shoulder) = Clavicle
- Third box (pointing to chest center) = Sternum
- Fourth box (pointing to ribs) = Ribs
- Fifth box (pointing to hip bone) = Pelvis
- Sixth box (pointing to wrist bones) = Carpals
- Seventh box (pointing to hand bones between wrist and fingers) = Metacarpals
- Eighth box (pointing to thigh bone) = Femur
- Ninth box (pointing to kneecap) = Patella
- Tenth box (pointing to shin bone) = Tibia
- Eleventh box (pointing to smaller lower leg bone) = Fibula
- Twelfth box (pointing to foot bones near ankle) = Tarsals
- Thirteenth box (pointing to toe bones) = Phalanges

Wait — let’s count the boxes on the left side. There are 13 boxes on the left? Actually, looking again:

Actually, better approach: Match based on standard anatomy labeling.

Standard front-view labels (left column):

- Skull → Cranium
- Collarbone → Clavicle
- Breastbone → Sternum
- Ribs → Ribs
- Hip → Pelvis
- Wrist → Carpals
- Hand (palm) → Metacarpals
- Thigh → Femur
- Knee cap → Patella
- Shin → Tibia
- Lower leg (side) → Fibula
- Foot (ankle area) → Tarsals
- Toes → Phalanges

But we also have Ulna and Radius — those are forearm bones. On front view, one box should point to inner forearm (ulna) and outer (radius). But in many simplified diagrams, they may not be labeled separately unless specified.

Looking back at the image description — there are multiple arrows. Let me reorganize by position.

Actually, since I can't see the exact positions, I'll use logical matching based on common textbook skeletons.

Here’s a reliable mapping for the front view (left side):

Top to bottom:

1. Head → Cranium
2. Shoulder/clavicle area → Clavicle
3. Chest center → Sternum
4. Rib cage → Ribs
5. Hip → Pelvis
6. Upper arm → Humerus
7. Forearm (inner) → Ulna
8. Forearm (outer) → Radius
9. Wrist → Carpals
10. Palm → Metacarpals
11. Thigh → Femur
12. Kneecap → Patella
13. Shin → Tibia
14. Outer lower leg → Fibula
15. Ankle → Tarsals
16. Toes → Phalanges

Wait — too many. Let’s count actual boxes in the original problem.

From user’s image description: There are 13 boxes on the left? Or more?

Actually, let’s look at the “Key Words” table — it has 21 terms. Some will be used twice? No, probably each term used once.

List of Key Words (21 items):

Ulna, Tarsals, Radius
Pelvis, Cranium, Carpals
Femur, Humerus, Scapula
Tibia, Ribs, Vertebral Column
Fibula, Patella, Sternum
Metacarpals, Clavicle, Phalanges
Metatarsals, Phalanges ← wait, Phalanges appears twice? Probably typo — maybe Metatarsals and Phalanges only once.

Actually, counting:

Row 1: Ulna, Tarsals, Radius → 3
Row 2: Pelvis, Cranium, Carpals → 3
Row 3: Femur, Humerus, Scapula → 3
Row 4: Tibia, Ribs, Vertebral Column → 3
Row 5: Fibula, Patella, Sternum → 3
Row 6: Metacarpals, Clavicle, Phalanges → 3
Row 7: Metatarsals, Phalanges → 2? That’s 20. Maybe duplicate error.

Assuming 20 unique terms needed.

Now, back to skeleton:

Typical front view (left side) labels:

- Cranium (head)
- Clavicle (collarbone)
- Sternum (breastbone)
- Ribs
- Pelvis
- Humerus (upper arm)
- Ulna (forearm)
- Radius (forearm)
- Carpals (wrist)
- Metacarpals (hand)
- Femur (thigh)
- Patella (knee)
- Tibia (shin)
- Fibula (lower leg)
- Tarsals (foot)
- Metatarsals (midfoot)
- Phalanges (toes/fingers)

That’s 17. Plus vertebral column, scapula — but scapula is back view.

Back view (right side) usually includes:

- Vertebral Column (spine)
- Scapula (shoulder blade)
- Ribs (also visible)
- Pelvis (same)
- Femur, etc.

So let’s assign properly.

I think the best way is to provide the most logical assignment based on standard diagrams.

Final Matching:

Front View (Left Skeleton):

1. Top head → Cranium
2. Below head, shoulder → Clavicle
3. Center chest → Sternum
4. Rib cage → Ribs
5. Hip → Pelvis
6. Upper arm → Humerus
7. Inner forearm → Ulna
8. Outer forearm → Radius
9. Wrist → Carpals
10. Palm → Metacarpals
11. Thigh → Femur
12. Kneecap → Patella
13. Shin → Tibia
14. Outer lower leg → Fibula
15. Ankle → Tarsals
16. Midfoot → Metatarsals
17. Toes → Phalanges

But that’s 17 — too many. Perhaps some are combined or omitted.

Wait — perhaps the diagram has fewer boxes. Let me assume based on common worksheets.

Commonly labeled bones in such diagrams:

Front:

- Cranium
- Clavicle
- Sternum
- Ribs
- Pelvis
- Humerus
- Ulna
- Radius
- Carpals
- Metacarpals
- Femur
- Patella
- Tibia
- Fibula
- Tarsals
- Metatarsals
- Phalanges

Still 17.

Perhaps "Vertebral Column" and "Scapula" are on back view.

Back view (right skeleton):

- Vertebral Column (spine)
- Scapula
- Ribs (again)
- Pelvis (again)
- Femur, etc.

But typically, each bone is labeled once.

Given the constraints, here’s a practical solution:

Assign as follows:

Left Side (Front):

Box 1 (head): Cranium
Box 2 (neck/shoulder): Clavicle
Box 3 (chest center): Sternum
Box 4 (ribs): Ribs
Box 5 (hip): Pelvis
Box 6 (upper arm): Humerus
Box 7 (forearm inner): Ulna
Box 8 (forearm outer): Radius
Box 9 (wrist): Carpals
Box 10 (hand palm): Metacarpals
Box 11 (thigh): Femur
Box 12 (knee): Patella
Box 13 (shin): Tibia
Box 14 (lower leg side): Fibula
Box 15 (ankle): Tarsals
Box 16 (midfoot): Metatarsals
Box 17 (toes): Phalanges

But if there are only 13 boxes on left, then perhaps some are missing.

Alternatively, perhaps the diagram expects:

For front view:

- Cranium
- Clavicle
- Sternum
- Ribs
- Pelvis
- Humerus
- Ulna
- Radius
- Carpals
- Metacarpals
- Femur
- Patella
- Tibia
- Fibula
- Tarsals
- Metatarsals
- Phalanges

And back view:

- Vertebral Column
- Scapula
- And others repeat? Unlikely.

Perhaps "Vertebral Column" is labeled on back, and "Scapula" on back.

Also, "Phalanges" might be used for both hands and feet, but usually specified.

Given the ambiguity, I'll provide the most accurate anatomical labeling based on standard educational materials.

After careful consideration, here is the correct filling:

Front View (Left Skeleton):

1. Cranium
2. Clavicle
3. Sternum
4. Ribs
5. Pelvis
6. Humerus
7. Ulna
8. Radius
9. Carpals
10. Metacarpals
11. Femur
12. Patella
13. Tibia
14. Fibula
15. Tarsals
16. Metatarsals
17. Phalanges

Back View (Right Skeleton):

1. Vertebral Column
2. Scapula
3. Ribs (already labeled, so perhaps not repeated)
4. Pelvis (repeated)
5. Femur (repeated)
etc.

This is messy. Perhaps the diagram has specific arrows.

Since I must provide an answer, I'll go with the following final assignment based on common practice:

Final Answer:

Front view blanks (top to bottom, left to right):

- Cranium
- Clavicle
- Sternum
- Ribs
- Pelvis
- Humerus
- Ulna
- Radius
- Carpals
- Metacarpals
- Femur
- Patella
- Tibia
- Fibula
- Tarsals
- Metatarsals
- Phalanges

Back view:

- Vertebral Column
- Scapula

But to fit the format, I'll list them in order as per typical worksheet.

Upon second thought, let's look at the key words and ensure all are used.

Key Words include: Ulna, Tarsals, Radius, Pelvis, Cranium, Carpals, Femur, Humerus, Scapula, Tibia, Ribs, Vertebral Column, Fibula, Patella, Sternum, Metacarpals, Clavicle, Phalanges, Metatarsals, and Phalanges again — so 20 items.

In a skeleton diagram, you label each bone once.

So for front view, label:

- Cranium
- Clavicle
- Sternum
- Ribs
- Pelvis
- Humerus
- Ulna
- Radius
- Carpals
- Metacarpals
- Femur
- Patella
- Tibia
- Fibula
- Tarsals
- Metatarsals
- Phalanges

That's 17.

Missing: Scapula, Vertebral Column.

These are typically on back view.

So back view should have:

- Vertebral Column
- Scapula

And perhaps others, but those are the main ones.

So overall, the blanks are filled as:

Front View:

1. Cranium
2. Clavicle
3. Sternum
4. Ribs
5. Pelvis
6. Humerus
7. Ulna
8. Radius
9. Carpals
10. Metacarpals
11. Femur
12. Patella
13. Tibia
14. Fibula
15. Tarsals
16. Metatarsals
17. Phalanges

Back View:

1. Vertebral Column
2. Scapula

But since the diagram may have specific arrow positions, and to match the number of boxes, I'll assume the following sequence for the entire diagram:

After analyzing, here is the definitive answer:

Final Answer:

The missing blanks are filled as follows:

- Head: Cranium
- Collarbone: Clavicle
- Breastbone: Sternum
- Rib cage: Ribs
- Hip: Pelvis
- Upper arm: Humerus
- Inner forearm: Ulna
- Outer forearm: Radius
- Wrist: Carpals
- Palm: Metacarpals
- Thigh: Femur
- Kneecap: Patella
- Shin: Tibia
- Lower leg (side): Fibula
- Ankle: Tarsals
- Midfoot: Metatarsals
- Toes: Phalanges
- Spine: Vertebral Column
- Shoulder blade: Scapula

All key words are used except possibly duplicate Phalanges, but it's fine.

To present in boxed format as requested:

\boxed{\text{Cranium, Clavicle, Sternum, Ribs, Pelvis, Humerus, Ulna, Radius, Carpals, Metacarpals, Femur, Patella, Tibia, Fibula, Tarsals, Metatarsals, Phalanges, Vertebral Column, Scapula}}

Note: This assumes 19 blanks; if the diagram has different number, adjust accordingly, but this is anatomically correct.