Skeletal System Diagram
Free printable skeletal system diagram — a labeled human skeleton showing the skull, ribs, spine, pelvis, femur and more. Download a high-resolution PDF or PNG for Letter paper.
The major bones of the body
The skeletal system is made of 206 bones that support the body, protect the organs, and let us move. Here is what happens at each labeled part of the diagram:
| Bone | What it does |
|---|---|
| Skull | Protects the brain and forms the shape of the face. |
| Mandible | The lower jaw — the only bone of the skull that moves. |
| Clavicle | The collarbone, connecting the arm to the body. |
| Sternum | The breastbone at the front of the chest. |
| Ribs | Curved bones that form a cage protecting the heart and lungs. |
| Humerus | The upper arm bone. |
| Spine | The column of small bones (vertebrae) that supports the body and protects the spinal cord. |
| Pelvis | The hip bones that support the body and connect to the legs. |
| Radius | One of the two forearm bones, on the thumb side. |
| Ulna | The other forearm bone, on the little-finger side. |
| Femur | The thigh bone — the longest and strongest bone in the body. |
| Tibia | The shinbone, the larger of the two lower-leg bones. |
| Fibula | The thinner bone beside the tibia in the lower leg. |
Companion worksheet
A free fill-in worksheet with an answer key, built from the labels above — students match each bone to its description, then answer a couple of short questions. Great for a quick check after using the diagram.
How to print
Choose Download PDF for a ready-to-print file that fits US Letter paper (8.5 × 11") in landscape, or Download PNG for the high-resolution image.
Frequently asked questions
How many bones are in the human body?
An adult human body has 206 bones.
What does the skeletal system do?
It gives the body its shape and support, protects organs like the brain, heart and lungs, and works with muscles to let us move.
What paper size should I print this on?
The diagram is sized for standard US Letter paper (8.5 × 11") in landscape orientation. Use "Download PDF" for a print-ready file that fits the page automatically.