BMS2011 Lecture Notes - Humerus, Scapula, Synovial Fluid
10 Jul 2013
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Document Summary
Mechanisms are things that maintain shape, allow movement and power that movement through division into: Rigid components frame of bicycle , a swing-set"s black frames. Tensile components ropes on the swing-set (can move around flexibly but if pulled tight they can provide support. Rigid materials resist tension, compression and shear very well. When loads are tensile you don"t need rigid material, you can substitute with a tensile member which is more efficient. Active tensile members: resist tension and produce tensile loads. Before we have a bony skeleton we have a cartilaginous skeleton: made of hyaline cartilage. Most turns to bone but some still exist: knee (articular surfaces), nasal cavity, every synovial joint, costal cartilage (in between ribs). Labra: extra bits on outside of hip joint and shoulder joint. Cartilage is about 50% collagen and proteoglycans (sugar protein substances) and ground substance gelatinous sugary kind of material. Cartilage is not very well vascularised: implications doesn"t heal as well.
