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AP Chapter 6 Flashcards

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8468267272Major functions of boneSupports and gives shape to the body Protects internal organs Skull protects brain; Sternum and ribs protect heart and lungs; bone protect red bone marrow - forms blood cells Helps make movement possible Stores calcium and phosphorus Bones hold 99% of bodies calcium0
8468291530HematopoiesisProcess of blood cell formation1
84682962764 Major types of bonesLong Humerus (arm bone) Short Carpals (wrist bone) Flat Frontal (skull bone) Irregular Vertebrae (spinal bone) ** Sesamoid / Round - Patella (kneecap bone)2
8468312795Structural components of long bonesDiaphysis or shaft Medullary cavity Epiphyses or ends of the bone Articular cartilage Periosteum Endosteum3
8468327418Medullary cavity—hollow area inside diaphysis containing yellow marrow4
8468337447Epiphyses or ends of the bone—spongy bone contains red bone marrow5
8468347182Articular cartilage- Covers epiphyses6
8468351166Periosteum- Strong fibrous covering of the bone; except the cartilage7
8468359812Endosteum- Lines the medullary cavity8
8468364673Condyle- rounded bump; forms joints9
8468368001Epicondyle- bump near condyle - "bump on bump"; attach connective tissues and muscles10
8468368002Crest- moderately raised border or ridge; attach muscle11
8468368003Facet- smooth flat surface; forms joints12
8468368183Fissure- long, crack-like hole for blood vessels and nerves13
8468371749Foramen- round hole; blood vessels, nerves, and ligaments pass14
8468377445Fossa- shallow depression; forms joints15
8468377446Process- a raised area or projection; attach connective tissues16
8468380500Sulcus (Sulci)- grooves; blood vessel, nerve, or tendon to pass17
8468380501Trochanter- large blunt bump; attach connective tissues18
8468396446Compact boneCortical19
8468399333Spongy boneTrabeculae20
8468422234Compact (dense) boneOuter layer Organized into numerous structural units called osteons (Haversian systems) Osteon - made of: - Concentric rings - Lamella - surround - Central Canal - contain - Blood vessel ** Lamella - resists bending Bone types Osteocytes - live bone cells Sense changes in strength Lacunae - spaces that contain osteocytes Canaliculi - canals that connect lacunae with one another and with central canals in each osteon Nutrients pass through21
8468432186Spongy bonePorous / open spaces at the ends of bone Filled with red bone marrow Trabeculae - needlelike threads of bone Resists compression22
8468451574CartilageCell type called chondrocyte located in the lacunae23
8468461583Difference of BoneFibers in a calcified cement Rigid bone Osteocytes in lacunae Nutrients move with blood vessels Heals quickly after injuries24
8468467909Difference of CartilageFibers in firm gel Flexibility of firm plastic Chondrocytes in lacunae Nutrients diffuse through matrix to reach cells Heals slowly after injuries25
8468477423Epiphyseal plateCartilage present - growth continues No cartilage - growth stops26
8468497361Epiphyseal lineMarks where two centers of ossification have fused together27
8468509220Endochondral ossification- "forming in cartilage" - A newborn's skeleton has many bones that have not completely ossified.28
8468522261"Remodeling"- Bone being built, broken down and rebuilt29
8468528731Osteoblasts- Build new bone30
8468528732Osteoclasts- Dissolve bone31
8468533238Osteoporosis- excessive loss of calcified matrix and collagenous fibers from bone causing spontaneous fractures32
8468537349Paget's disease- bones become thickened and enlarged but also brittle due to abnormal structural development33
8468554949Leukemia- damaged bone marrow; makes abnormal amounts of white blood cells known as leukocytes34
8468554950Axial SkeletonSkull (28) Spine (26) Chest (25) Hyoid (1) - not directly attached35
8468568752Appendicular SkeletonUpper extremities (64) Shoulder / Pectoral girdle Arms Wrist Hands Lower extremities (62) Hip / Pelvic girdle Legs Ankles Feet36
84685818193 types of jointsSynarthroses Amphiarthroses Diarthroses37
8468588052SynarthrosesNo movement Fibrous connective tissue grows between articulating bones Example: Sutures of skull38
8468594695AmphiarthrosesSlight movement Cartilage connects articulating bones Examples: Symphysis pubis - between the pubic bones Vertebrae joints - flex / rotate Kinds of joints39
8468611066DiarthrosesFree movement —most joints belong to this type Structures are made alike in certain ways Joint capsule Made of strongest and toughest fibrous connective tissue Lined with synovial membrane Attaches to shaft of bone Ligaments connect bone to bone Joint cavity Space between bones A layer of cartilage at end of bones40
8468655131Articular cartilageCovers joint ends of bones Absorbs jolts Smooth surface = little friction41
8468676848Synovial Membrane—lines joint capsule and secretes lubricating fluid allowing easier movement and less friction42
8468687712Gliding- least moveable (Vertebrae)43
8468704733Ball and Socket- widest range of movement (Shoulder)44
8468687713Conyloid- Oval projection (Radius/ Carpal)45
8468703133Hinge- allow movement in only 2 directions (Elbow)46
8468699409Flexion- bending a joint; reduces angle of joint47
8468699410Extension- straightening a joint; increases angle of joint48
8468699411Pivot- pivots in an arch Rotation - of head (Axis/Atlas)49
8468695955Saddle- Only one exists in the body (Thumb)50
8468800655OpenGoes through the skin51
8468800656ClosedNo open wound52
8468800657TransverseRuns across bone53
8468779663DepressedDriven inward54
8468779664Fracture DislocationDue to bone out of joint55
8468783987GreenstickBent but still hinged at one side56
8468797228ObliqueSlants on bone57
8468797229SpiralCoils around bone58
8468783988LongitudinalRuns parallel with bone59
8468787388ComminutedSplintered into fragments60
8468793744ExtracapsularBroken outside joint61
8468793745IntracapsularBroken inside joint62
8468787389ImpactedWedged into other break63
8468790307PathologicAt the site of bone disease64

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