The Skeletal System Worksheet | PDF | Human Body | Skeleton - Free Printable

Let's solve this Skeletal System worksheet step by step. We'll complete the "Fill in the Blanks" section using the provided word bank, and then label the bones on the diagram using the second word bank.

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🔹 Part 1: Fill in the Blanks

Word Bank (for fill-in-the-blank):
- Grow
- Brain
- Calcium
- Spinal
- Fuse
- 206
- Skull
- Ribs
- Equipment
- Move

Now, let’s go through each sentence:

1. An average adult has ______ bones.
→ 206 (This is a well-known fact: adults have 206 bones.)

2. Bones ______ as we get older.
→ Fuse (As babies grow, some bones fuse together — e.g., skull bones fuse over time.)

3. A baby is born with 300 bones, but they ______ together as they get older.
→ Fuse (Again, bones fuse during growth.)

4. Your skeletal system is what supports your muscles, allowing you to ______.
→ Move (Muscles attach to bones; movement happens via muscle contraction on bones.)

5. Your spine is made up of 33 bones that protect your ______ cord and allow you to twist, bend, and stay upright.
→ Spinal (The spinal cord runs through the vertebral column.)

6. Your ______ protect your vital organs, like your heart.
→ Ribs (The ribcage protects the heart and lungs.)

7. Your ______ protects the most important organ, your brain!
→ Skull (The skull encloses and protects the brain.)

8. You can protect your bones by wearing proper ______ when playing sports.
→ Equipment (Safety gear like helmets, pads, etc.)

9. You can strengthen your bones by eating dairy, which contains ______.
→ Calcium (Calcium is essential for bone strength.)

✔ Completed Fill-in-the-Blanks:

> An average adult has 206 bones. Bones fuse as we get older. A baby is born with 300 bones, but they fuse together as they get older. Your skeletal system is what supports your muscles, allowing you to move. Your spine is made up of 33 bones that protect your spinal cord and allow you to twist, bend, and stay upright. Your ribs protect your vital organs, like your heart. Your skull protects the most important organ, your brain! You can protect your bones by wearing proper equipment when playing sports. You can strengthen your bones by eating dairy, which contains calcium.

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🔹 Part 2: Label the Bones in the Skeletal System

Word Bank (for labeling):
- Patella
- Femur
- Cranium
- Humerus
- Ribs
- Pelvis
- Sternum
- Spine

We’ll label the skeleton diagram based on standard anatomy:

Let’s identify the labeled lines from top to bottom:

1. Top of the head (skull) → Cranium
2. Backbone (running down the center) → Spine
3. Rib cage (side of chest) → Ribs
4. Breastbone (center of chest) → Sternum
5. Upper arm bone → Humerus
6. Hip area (pelvic region) → Pelvis
7. Thigh bone (upper leg) → Femur
8. Knee cap → Patella

Now, match these to the blank lines on the diagram (assuming the lines are in order from top to bottom):

1. Cranium
2. Spine
3. Ribs
4. Sternum
5. Humerus
6. Pelvis
7. Femur
8. Patella

✔ Final Labels:

| Line Number | Bone Name |
|-------------|----------------|
| 1 | Cranium |
| 2 | Spine |
| 3 | Ribs |
| 4 | Sternum |
| 5 | Humerus |
| 6 | Pelvis |
| 7 | Femur |
| 8 | Patella |

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✔ Final Answer Summary:

#### Fill in the Blanks:
1. 206
2. fuse
3. fuse
4. move
5. spinal
6. ribs
7. skull
8. equipment
9. calcium

#### Labeling the Diagram:
From top to bottom:
1. Cranium
2. Spine
3. Ribs
4. Sternum
5. Humerus
6. Pelvis
7. Femur
8. Patella

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Let me know if you'd like this formatted as a printable answer key or need help with coloring/annotating the image!