Musculo-skeletal System. Overview of musculo-skeletal system Musculo-skeletal system is composed of: ◦ Muscles ◦ Bones ◦ Cartilage ◦ Ligaments ◦ Tendons.

Download Musculo-skeletal System. Overview of musculo-skeletal system Musculo-skeletal system is composed of: ◦ Muscles ◦ Bones ◦ Cartilage ◦ Ligaments ◦ Tendons.

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<ul><li><p>Musculo-skeletal System</p></li><li><p>Overview of musculo-skeletal systemMusculo-skeletal system is composed of:MusclesBonesCartilageLigamentsTendons</p></li><li><p>TASKWhat does the musculoskeletal system do?Write down some ideas.</p></li><li><p>What does the musculoskeletal system do?Its functions is to allow:MovementMaintenance of postureSupportProtection of internal organsHeat production</p></li><li><p>Muscular system </p></li><li><p>MusclesThree main types of muscle:CardiacHeart muscleSmoothFound in internal organsSkeletalAlso known as voluntary musclesAttached to bones on the skeletonOver 600 in the body</p></li><li><p>Types of voluntary musclesMuscles work in ANTAGONISTIC pairs: As one muscle contracts, the other muscle relaxes.</p><p>There are different types of muscles. Each has a different function and they usually work in pairs.</p><p>Extensors and FlexorsAdductors and AbductorsLevators and DepressorsConstrictors</p></li><li><p>Types of voluntary musclesExtensors open a joint</p><p>Adductors move body part inwards</p><p>Levators move body part upwards</p><p>Constrictors (circular muscles so do not have a pair; also called sphincter muscles)Close openingsFlexors </p><p>Abductors</p><p>Depressors</p><p>Here are some functions the pairs of muscles. What is the function of the other half to the pair?</p></li><li><p>Types of voluntary musclesExtensors open a joint</p><p>Adductors move body part inwards</p><p>Levators move body part upwards</p><p>Constrictors (circular muscles so do not have a pair; also called sphincter muscles)Close openingsFlexors close a joint</p><p>Abductorsmove body part outwards</p><p>Depressorsmove body part downwards</p><p>Muscles work in ANTAGONISTIC pairs: As one contracts the other relaxes.</p></li><li><p>A synovial joint</p></li><li><p>Synovial joint</p></li><li><p>Task: Main Parts of a Synovial JointLook up in the textbook or using internet resources to find the function of the following parts of a synovial joint\;</p><p>BoneArticular CartilageSynovial membraneSynovial fluidLigamentsTendons</p></li><li><p>Main Parts of a Synovial JointBone:Mixture of protein, collagen and minerals e.g. calciumArticular Cartilage:Smooth tissue which protects bones and stops them grating by reducing frictionSynovial membraneLines the joint capsule and secretes synovial fluidSynovial fluidActs like a lubricant, helps bones slide over each otherLigamentsHolds bones together and prevents over extension of jointTendonsConnects muscle to bone</p></li><li><p>Movement of the forearm</p></li><li><p>Movement of the forearmMuscles get shorter when they contractBig biceps when you flex your arm!</p><p>Muscles get longer and more stretched out when they relaxFlat biceps when you put your arm down!</p></li><li><p>Task: making a model armMake the model arm and complete the worksheet.</p><p>Follow all instructions on the sheet</p></li><li><p>Answers to questionsWhen the biceps contract and the triceps relax the forearm moves upwards When the triceps contract and the biceps relax the forearm moves downards We call this an Antagonistic Pair, meaning as one muscle contracts the other relaxes.Label the parts of the forearm.</p></li><li><p>Answers to forearm labelling</p></li><li><p>Skeleton </p></li><li><p>Skeleton functionsIts functions is to allow:MovementSupportProtection of internal organs</p></li><li><p>Major organs and their skeletal protection: Copy &amp; CompleteBody systemOrganprotectedPart of the skeletonNervous systemRespiratory systemCardiovascular systemRenal systemDigestive systemReproductive system</p></li><li><p>Major organs and their skeletal protection</p><p>Body systemOrgan protectedPart of the skeletonNervous systemBrainSkullSpinal CordSpinal columnSense organs e.g. Ears, eyesSkull </p><p>Respiratory systemLungs &amp; bronchiRib cage, spinal column, sternumCardiovascular systemHeart &amp; major blood vesselsRib cage, spinal column, sternumRenal systemKidneys Rib cage and spinal columnDigestive systemLiverRib cageReproductive systemOvaries, uterusPelvis </p></li></ul>

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