The human skeleton has two main subdivisions: the axial skeleton, which includes the vertebral column and much of the skull, and the appendicular skeleton, which includes the pelvic and …

Learn about the structure of the human skeleton and its role in support, protection, and movement of the body The Editors of Encyclopaedia Britannica

The cranial cavity has a rough, uneven floor, but its landmarks and details of structure generally are consistent from one skull to another. The cranium forms all the upper portion of the skull, …

Learn about the parts and functions of the skeletal system The Editors of Encyclopaedia Britannica

Dec 10, 2025 · Characteristic of the vertebrate form, the human body has an internal skeleton that includes a backbone of vertebrae. Typical of mammalian structure, the human body shows …

Dec 13, 2025 · The human skeleton has two main subdivisions: the axial skeleton, which includes the vertebral column and much of the skull, and the appendicular skeleton, which includes the …

Human skeleton - Arms, Legs, Joints: The humerus and the femur are corresponding bones of the arms and legs, respectively. While their parts are similar in general, their structure has been …

While the osteoclasts resorb bone at various sites, other cells called osteoblasts make new bone to maintain the skeletal structure. During childhood, bone formation outpaces destruction as …

Skeletal elements are of six principal types: hard structures, semirigid structures, connective tissue, hydrostatic structures, elastic structures, and buoyancy devices.

While their parts are similar in general, their structure has been adapted to differing functions. The head of the humerus is almost hemispherical, while that of the femur forms about two-thirds of …