ACS_0217.jpg - *1 SKELETAL SYSTEM Human Skeletal System = 206 bones function composed of bones cartilages ligaments many Axial Skeleton 80bones

ACS_0217.jpg - *1 SKELETAL SYSTEM Human Skeletal System =...

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Unformatted text preview: *1 : SKELETAL SYSTEM Human Skeletal System = 206 bones function : ( composed of bones, cartilages, ligaments & many , Axial Skeleton : 80bones vertebral column, ribcage, sterum, skull, hyoid . protects internal organs (surrounds the soft tissue ) . maintains mineral he . ribcage = 12 pairs of ribs L'10 pairs of true ribs & 2 floating ribs . provides structural support for the body storage of minerals and sternum = manubrium Hemopoiesis = blood ce Corpus sterni generates movement Xiphoid process) Axial Skeleton - (bones in the central axis ) (occurs in the K . skull - cranium - facial bone - ossicles foundation of the skeletal system & provides skeletal support ppendicular Skeleton = 126 bones Consists of the skull , vertebral column, 12 pair of ribs & the sternum =80 bones bpectoral girdle , pelvic girdle, appendages pectoral girdle = scapulae & clavicle Appendicular skeleton -corner bones) pelvic girdle = 2 pelvic hip bone attached to sacrum support the movement upper appendages = (arms) humerus, radius, vina, "consists of the girdles & the limbs carpals, metacarpal, phalanges lower appendages = (legs) femur, patella, fibula, types of bones : tibia , tarsals, metatarsals, phalanges 1 Long Bones 2 Short Bones 3 Flat bones 4 Irregular Bones 5 sesamoid Bones longer than wide cube - shaped protect internal organs vary in shape reinforce tendons from stress epiphyses @ the ends @ ankle joint & @wrist - eg . Cranial bones protect g. vertebrae, sacrum & wear - with spongy bone brain , sternum , eg . patella diaphyses with compact joints scapulae, ribs bone eg. tarsals & carpals Compact Bone eg. femur, humerus tightly packed cells protective shell around spongy bone tissue compact bone contains blood vessels carry/ to blood 's strong, dense, rigid 4 gives bone regidity, strength Haversian canals - surround lamellae to osteon Compact Bone made up of cylindrical units , osteons Lamellae - concentric circles with concentric rings , lamellae Lacunae- space between lamellae EPIPHYSES ( lamellae grows around old lamellae & DIAPHYSIS fuse = stronger ) periosteum - outer membrane covers bone . also has central canal - with blood vessels between lamellae are spaces , Spongy Bone . . . acunde = contains osteocytes to Trabeculae - light weight & porous . .. Haversian system L consist of lamellaed canals Trabeculae collect Carr & P for blood - where bone marrow is medullary cavity yellow bone marrow JOINTS = @ the point where two/t bones are connected types of joints : " for body movements = when muscle contract across joints & moving I bone towards another 1 FIBROUS Joints (SYNARTHROSIS ) ligament immovable joints 4 held together by only a ligament eg. in skull, in teeth 2 CARTILAGINOUS Joints (AMPHIARTHROSIS ) joint cavity Articular semimovable > unite bones using cartilages Cartilage 3 SYNOVIAL JOINTS (DIARTHROSIS ) Synvoial Fivid ( hyaline ) highly movable ~ Keep lubricant CI -1 Hinge Joint 3 Ball & Socket Joint Q 5 Gliding Joint flexion & extension eg. shoulder / hip eg. elbow a knee flexion/ extension gliding movement 2 Pivot Joint rotation Condyloid Joint - rotation of one bone around 4 saddle Joint another g top of neck...
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