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| Human skeleton | |
|---|---|
| Name | Human skeleton |
| Caption | Anterior view of the adult human skeleton |
| System | Musculoskeletal system |
| Components | Bones, cartilages, ligaments |
| Artery | Femoral artery, Subclavian artery |
| Vein | Jugular vein, Iliac vein |
| Nervous | Brachial plexus, Sciatic nerve |
Human skeleton The human skeleton is the internal framework that supports the body, protects vital organs, and enables locomotion. It interacts with muscles, blood vessels, and nerves to maintain posture, permit movement, and play roles in mineral homeostasis and hematopoiesis. The adult skeleton typically comprises 206 bones arranged into distinct regions that reflect evolutionary, developmental, and clinical considerations.
The skeleton provides structural support for the United Kingdom-style upright stance described in comparative anatomy, protects organs such as the Heart and Brain, and transmits forces during activities studied in institutions like Harvard University biomechanics labs and Mayo Clinic clinical research. It also serves as a reservoir for calcium and phosphate managed by endocrine centers exemplified by Johns Hopkins Hospital endocrine studies and contributes to blood cell production in bone marrow units investigated at Memorial Sloan Kettering Cancer Center and Fred Hutchinson Cancer Center.
Bones consist of an outer compact layer and inner cancellous trabecular bone; microscopic units such as osteons are characterized in texts from Oxford University Press and research from Max Planck Society. Cells include osteoblasts, osteocytes, and osteoclasts regulated by hormones studied at Karolinska Institutet and signaling pathways explored at Salk Institute. Endochondral and intramembranous ossification during embryogenesis are topics in curricula at Stanford University School of Medicine and developmental biology reports from Cold Spring Harbor Laboratory.
The axial skeleton comprises the skull, vertebral column, ribs, and sternum—structures examined in anatomy courses at University of Cambridge and radiology series from Cleveland Clinic. The cranial vault protects the Brain and houses sinuses described in atlases used by Mayo Clinic surgeons; the vertebral column includes cervical, thoracic, lumbar, sacral, and coccygeal segments important in procedures performed at Massachusetts General Hospital and spinal research at Johns Hopkins University. The rib cage articulates with the thoracic vertebrae and sternum, protecting intrathoracic organs central to care at Royal Brompton Hospital.
The appendicular skeleton includes the girdles and limbs: the pectoral girdle (scapula and clavicle), upper limb (humerus, radius, ulna, carpals, metacarpals, phalanges), pelvic girdle (ilium, ischium, pubis), and lower limb (femur, tibia, fibula, tarsals, metatarsals, phalanges). Orthopedic principles applied at Mayo Clinic and sports medicine programs at Aspetar address fractures of the femur and clavicle frequently encountered in settings such as Olympic Games athlete care and trauma centers like Karolinska University Hospital.
Joints include fibrous, cartilaginous, and synovial types; synovial joints (e.g., shoulder, hip, knee) are focal points of surgery at Cleveland Clinic and joint replacement programs at Hospital for Special Surgery. Cartilage structures such as the menisci and articular cartilage are studied in translational research at Harvard Medical School and regenerative medicine trials at Stanford Medicine. Ligamentous injuries involving the anterior cruciate ligament are commonly reported in sports medicine literature from FIFA-related research and treated in centers like Herzliya Medical Center.
Bones provide attachment sites for muscles whose actions are mapped in atlases used at Columbia University anatomy labs; major neurovascular bundles accompany bones (e.g., brachial plexus with the humerus, sciatic nerve with the pelvis) in clinical teachings at University of California, San Francisco. Arterial supply to bones via nutrient arteries and periosteal vessels involves branches such as the femoral artery, studied in vascular surgery units at Cleveland Clinic and Johns Hopkins Hospital. Venous plexuses and lymphatic drainage relevant to oncology are managed in centers like MD Anderson Cancer Center.
Common disorders include fractures, osteoarthritis, osteoporosis, congenital anomalies (e.g., scoliosis), metabolic bone diseases such as rickets and osteomalacia, and neoplasms like osteosarcoma—conditions treated and researched at institutions including Mayo Clinic, Memorial Sloan Kettering Cancer Center, and Royal National Orthopaedic Hospital. Imaging modalities (radiography, CT, MRI) by manufacturers and services used at Siemens Healthineers and clinical departments in Johns Hopkins Hospital are essential for diagnosis. Preventive and therapeutic strategies involve endocrinologists, orthopedic surgeons, and rehabilitation teams from programs at Cleveland Clinic and Massachusetts General Hospital.