We all know skeletons are synonymous with Halloween, but there’s no reason to be afraid! The skeletal system does so much more than just keeping your body upright — it even helps to make blood cells!
Never Miss a Beat!
Subscribe to Our HealthBeat Newsletter!
Thank you for subscribing!
You can now select the specific newsletters you'd like to receive.
You are already subscribed.
Subscribe to more newsletters in our email preference center.
Sorry, an error occurred. Please try again later.
Get Healthy Tips Sent to Your Phone!
Functions of the Skeletal System
Made up of 206 bones, the skeletal system’s functions include:
- Blood cell production
- Support
- Movement
- Protection
- Ion storage
- Endocrine regulation
Bone Composition
Do you know what makes up a bone in your body? Working from the outside in, here is a breakdown of your bone composition:
- Periosteum – Outer surface, thin membrane containing nerves and blood vessels
- Compact bone – smooth and hard, under the periosteum
- Cancellous bone – inside compact bone, resembles a sponge
- Bone marrow – inside compact bone, makes blood cells, resembles a thick jelly
Check out our infographic to see why skeletons are nothing to be afraid of:

About UPMC Orthopaedic Care
When you are dealing with bone, muscle, or joint pain, it can affect your daily life. UPMC Orthopaedic Care can help. As a national leader in advanced orthopaedic care, we diagnose and treat a full range of musculoskeletal disorders, from the acute and chronic to the common and complex. We provide access to UPMC’s vast network of support services for both surgical and nonsurgical treatments and a full continuum of care. Our multidisciplinary team of experts will work with you to develop the treatment plan that works best for you. Our care team uses the most innovative tools and techniques to provide better outcomes. We also are leaders in research and clinical trials, striving to find better ways to provide our patients care. With locations throughout our communities, you can find a provider near you.