BIOL 1103Week 5Human Skeleton
HUMAN SKELETON LABIdentify parts on a human skeletonIdentify loose pieces of boneIdentify differences in pelvis of males and females
BONESLong bonesTypes of bone tissueBone productionBone growthBone fractures
Partially sectioned humerus (arm bone)ArticularcartilageSpongy boneEpiphyseal lineCompact boneNutrient arteryMedullarycavityPeriosteumArticular cartilageProximal epiphysisMetaphysisDiaphysisMetaphysisDistal epiphysisHumerusPARTS OF LONG BONE
PARTS OF LONG BONEDiaphysis: shaftEpiphysis: one end of long boneMetaphysis: growth plate region containing the epiphyseal lineArticular cartilage: cartilage found at the joint surfaces which act as friction and shock absorbersMedullary cavity: the cavity inside the shaft of bones; contains yellow bone marrowPeriosteum: the lining covering the bone, but not the cartilageFibrous outer layerOsteogenic inner layer
COMPACT BONE - STRUCTUREOrganized & strongForms hard layer of bone in shaft of long bones; external layer of all bonesResists stresses produced by weight and movementMain function is supportContains yellow bone marrow for storage of triglycerides (fat)
COMPACT BONE - STRUCTUREBlood vesselsCanaliculiOsteocyteLacunaCompact boneSpongy boneMedullarycavityOsteonPeriosteum:Outer fibrous layerInner osteogeniclayer
COMPACT BONE - STRUCTUREOsteon:concentric rings (lamellae) of calcified matrix, surrounding a vertically oriented blood vessel (haversion system)Osteocytesare found in spaces called lacunaeOsteocytes communicate through canaliculifilled with extracellular fluid that connect one cell to another
SPONGY BONEEnlarged aspect of spongy bone trabeculaeSpace for red bone marrowDetails of a section of a trabeculaTrabeculaeOsteocyteOsteoclastOsteoblasts aligned along trabeculae of new boneLacunaLamellaeCanaliculi
SPONGY BONELess organizedLattice-like structure of thin plates of bone (trabeculae) oriented along lines of stressSpaces found in the trabeculae are filled with red bone marrow (formation of red blood cells)Found in the ends of long bones and inside flat bones
HOW ARE BONES FORMEDDURING DEVELOPMENT?
OSSIFICATIONThe process of forming bones1.
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