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  1. Human skeleton | Parts, Functions, Diagram, & Facts | Britannica

    Feb 6, 2026 · What are the primary functions of the human skeleton? The primary functions of the human skeleton are support, protection, and motion. Support is the most primitive and oldest …

  2. Bone | Definition, Anatomy, & Composition | Britannica

    Feb 4, 2026 · Bone is a rigid body tissue consisting of cells embedded in an abundant hard intercellular material. Bone tissue makes up the individual bones of the skeletons of …

  3. Bone - Structure, Function, Types | Britannica

    Feb 4, 2026 · Depending on how the protein fibrils and osteocytes of bone are arranged, bone is of two major types: woven, in which collagen bundles and the long axes of the osteocytes are …

  4. Human skeleton - Axial, Visceral, Bones | Britannica

    Feb 6, 2026 · The cranium is formed of bones of two different types of developmental origin—the cartilaginous, or substitution, bones, which replace cartilages preformed in the general shape …

  5. Human body | Organs, Systems, Structure, Diagram, & Facts

    Jan 19, 2026 · Characteristic of the vertebrate form, the human body has an internal skeleton with a backbone, and, as with the mammalian form, it has hair and mammary glands.

  6. Bone - Calcium, Phosphate, Hardness | Britannica

    Feb 4, 2026 · Depending on how the protein fibrils and osteocytes of bone are arranged, bone is of two major types: woven, in which collagen bundles and the long axes of the osteocytes are …

  7. Leg | Definition, Bones, Muscles, & Facts | Britannica

    Feb 6, 2026 · The bones of the human leg, like those of other mammals, consist of a basal segment, the femur (thighbone); an intermediate segment, the tibia (shinbone) and the smaller …

  8. Skeleton - Bones, Joints, Muscles | Britannica

    In vertebrates the adult skeleton is usually formed of bone or cartilage—living substances that grow with the animal, in contrast to the many types of invertebrate skeleton that do not grow or …

  9. Skull | Definition, Anatomy, & Function | Britannica

    Feb 13, 2026 · Skull, skeletal framework of the head of vertebrates, composed of bones or cartilage, which form a unit that protects the brain and some sense organs. The skull includes …

  10. Foot | Description, Drawings, Bones, & Facts | Britannica

    Jan 30, 2026 · The human foot is nonprehensile and is adapted for a form of bipedalism distinguished by the development of the stride—a long step, during which one leg is behind …