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Medical Terminology. Musculoskeletal System Chapter 11. Functions. support and protect internal organs bones body movements joints and muscles blood forming function (hematopoiesis) bone marrow mineral storage. Long Bones. diaphysis, epiphysis compact bone, medullary cavity
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Medical Terminology Musculoskeletal System Chapter 11
Functions • support and protect internal organs • bones • body movements • joints and muscles • blood forming function (hematopoiesis) • bone marrow • mineral storage
Long Bones • diaphysis, epiphysis • compact bone, medullary cavity • spongy bone, erythropoiesis and leukopoiesis • periosteum, osteoblasts
Other Bones • Short - cancellous bone • Irregular • Flat
Skeleton 206 bones • Axial Skeleton • 80 bones • skull, spinal column, ribs, sternum • protects major organs of nervous, respiratory, and circulatory systems
Skeleton • Appendicular126 bones • upper extremities and shoulder girdle • protects organs of digestion, excretion, reproduction
Vertebral Column • vertebrae - 26 • cervical - 7 • thoracic - 12 • lumbar - 5 • sacrum - 1 • coccyx - 1 • intervertebral disks
Ribs and Sternum • 12 pairs of ribs, costals (cost/o) • sternum , breast bone • xiphoid process • thoracic cavity
Shoulders • pectoral or shoulder girdle • clavicle or collarbone • scapula
Humerus • Radius • Ulna Arms Radius Ulna
Phalanges • carpals • metacarpals • phalanges Metacarpals Carpals
Pelvic (Hip) Girdle • ilium - upper, blade shaped • ischium - lower and posterior • acetabulum - hip socket • symphysis pubis - anterior portion • sacrum • coccyx
Joints (articulations) • Diarthroses, amphiarthroses, synarthroses • ligaments bones to bones • tendons muscles to bones • synovial membrane and fluid
Functions of Muscles • hold the body erect • make movements possible • move food, fluids and other body structures through ducts • propulsion of blood • contraction of bladder • muscle movement produces about 85% of heat generation
Attachments • fleshy attachments • muscle fibers arise from bone • fibrous attachments • connective tissue (epimysium, perimysium, endomysium)to form a tendon • aponeurosis - large area of fibrous attachment
Types of Muscles Three types of muscle tissue - described according to their function. • striated, voluntary • smooth, unstriated, involuntary, visceral • cardiac, involuntary • Striated in appearance, smooth in action
Pathology - Bones • osteomyelitis • bone infection • hematoma, ankylosis, necrosis • Paget’s disease (osteitis deformans) • chronic inflammation of bones
Fractures • closed or simple • open or compound • complicated • comminuted • impacted • incomplete • greenstick
Osteoporosis • Decrease on bone density • bone pain, commonly in the back
Spinal Disorders • scoliosis • kyphosis • lordosis • spina bifida • spina bifida occulta • spina bifida cystica • spondylitis
Joints • arthritis • rheumatoid • osteoarthritis (degenerative joint disease) • gouty arthritis
Muscles Myasthenia gravis acetylcholine (neurotransmitter) Muscular dystrophy genetic, atrophy
Oncology • Osteomas • sarcoma • fibrosarcoma • lymphosarcoma • chondrosarcoma • Ewing’s sarcoma