Skeletal system
The skeletal system provides the rigid framework of the body. Bones protect vital organs, act as levers for muscles, store calcium and phosphate, and contain marrow that produces blood cells.
The atlas models individual bones together with teeth and small skeletal elements. Choose a bone to see its position, main landmarks, articulations and muscle attachments.
The atlas models this system as interactive 3D geometry (toggle it in the Systems panel).
Open the 3D atlasStructures
BoneHead and neck
Atlas (C1)
BoneHead and neck
Axis (C2)
BoneLower limb
Calcaneus
BoneUpper limb
Clavicle
BoneLower limb
Femur
BoneLower limb
Fibula
BoneAbdomen and pelvis
Hip bone
BoneUpper limb
Humerus
BoneHead and neck
Mandible
BoneLower limb
Patella
BoneUpper limb
Radius
BoneThorax
Ribs
BoneBack
Sacrum
BoneUpper limb
Scapula
BoneHead and neck
Skull
BoneThorax
Sternum
BoneLower limb
Talus
BoneLower limb
Tibia
BoneUpper limb
Ulna
BoneBack
Vertebral column
Common questions
How many bones are in the adult human body?
An adult typically has 206 named bones, although the exact number varies between people because of extra sesamoid bones and differences in fusion of some bones.
What are the main functions of the skeleton?
Support, protection of organs, movement through attachment of muscles, mineral storage and blood cell formation in bone marrow.