Human Skeletal Anatomy and Bone Landmarks

General Anatomy of the Skeletal System

  • Axial Skeleton Components:

    • Skul l (Skull): Comprised of Crania l bones and Facial bones.
    • Vertebrae: Includes Thoracic vertebra, Sacrum, and Coccyx.
    • Thoracic Cage: Comprised of the Sternum and Rib s.

  • Appendicular Skeleton Components:

    • Pectoral Girdle: Includes the Clavicle and Scapula.
    • Upper Limbs: Includes the Humerus, Radius, Uln a, Carpals, Metacarpals, and Phalanges.
    • Pelvic Girdle: Specifically identified as the Hip bone (coxal bone).
    • Lower Limbs: Includes the Femur, Patella, Tibia, Fibula, Tarsals, Metatarsals, and Phalanges.

Bone Markings and Structural Features

  • General Bone Surface Markings:

    • Tuberosity: A broad, often rough surface for muscle or ligament attachment.
    • Not ch / Notch: An indentation at the edge of a structure.
    • Spin e / Spine: A sharp, slender, or narrow process.
    • Ramus: An arm or branch of a bone.
    • Foramen / Forame n: An opening or hole through a bone. Specific examples include the Foramen magnum (in the skull) and the Obturator foramen (in the hip bone).
    • Tubercle / Tubercle s: A small, rounded projection or process.
    • Lin e / Line: A low ridge, less prominent than a crest.
    • Cres t / Crest: A narrow, prominent ridge of bone.
    • Foss a / Fossae: A shallow, basinlike depression in a bone, often serving as an articular surface.
    • Cana l: A duct or channel.
    • Process / Proce ss: Any bony prominence or projection.
    • Meatus: A canal-like passageway.
    • Sinuses: Cavities within a bone, filled with air and lined with mucous membrane.
    • Alveolus: A pit or socket (e.g., tooth socket).
    • Protuberance: A bony outgrowth or protruding part.
    • Fissures: A narrow, slitlike opening.
    • Facets: A smooth, nearly flat articular surface.

  • Specific Features of the Long Bones:

    • Femur (Posterior View):
      • Hea d: The rounded proximal end.
      • Fovea: A small pit or depression on the head of the femur.
      • Trochanters: Large, blunt, irregularly shaped processes (specific to the femur).
      • Condyles: Rounded articular projections.
      • Epicondyles: Raised areas on or above a condyle.
      • Line: Linear elevation on the shaft.
    • Humerus (Anterior View):
      • Hea d: Proximal rounded end.
      • Tubercle s: Projections for muscle attachment.
      • Sulcus: A groove or furrow.
      • Tuberosity: Rough area for attachment.
      • Fossa: Depression for articulation or muscle.
      • Condyl e: Rounded articular surface.

Specialized Bone Views and Identification

Following the anatomical diagrams provided, several specific perspectives are utilized for structural identification:

  • Skull (Lateral View): Highlights the Ramus, Process, Meatus, and various bone junctions.
  • Skull (Anterior View): Highlights Fissures, Fossae, and Process.
  • Skull (Cranial Cavity, Superior View): Highlights the Foss a, Foramen (specifically the Foramen magnum), and Cana l.
  • Scapula (Posterior View): Highlights the Spin e, Process, and Foss a.
  • Hip (Coxal) Bone (Lateral View): Highlights the Tuberosity, Not ch, Spin e, Ramus, and Foramen (obturator foramen).
  • Thoracic Vertebra (Superior View): Highlights the Tubercle, Lin e, Cres t, Facets, and Proce ss.

Master Terminology List for Skeletal Identification

Based on identified figures and terms provided for reference:

  • Clavicle
  • Femur
  • Fibul a
  • Hip bone
  • Humeru s
  • Patell a
  • Radiu s
  • Ri b
  • Sacrum
  • Scapul a
  • Sternum
  • Tibi a
  • Ulna

Internal Diagram Reference Systems

  • Figure 13.3a Numbers: Identifies 11 distinct anatomical regions or bones (numbered 1 through 11).
  • Figure 13.3b Numbers: Identifies 11 distinct anatomical regions or bones in a secondary orientation (numbered 1 through 11).