KKU_Biomech_M1_L1 Musculoskeletal system Lesson (1)Dr / Shimaa EssaLecturer of physical therapy , faculty of community,King Khalid university
Upon successful completion of this lesson you would be able to: 1- Identify functions of bones. 2- Distinguish between different Classifications of bones. 3- Name all bones of the human skeleton.
IntroductionBone is a calcified osteoid [os = bone+ oid = form or resemblance] tissue.Bones function as levers, mineral salts store,supporters and protectors of the vital organsof the human body. Bones have severalclassifications along with its sub-classifications, that you need to know allabout it.
Functions of Bones1) Support of the body2) Protection of soft organs3) Movement due to attached skeletal muscles4) Storage of minerals and fats5) Blood cell formation
1. Long- bones are longer than they are wide, and have a shaft and 2 condyles.(Humerus, metacarpals)2. Short- usually square in shape, cube like (carpals, tarsals)3. Flat- flat , curved (cranial bones, Sternum)4. Irregular- odd shapes (vertebrae, pelvis)5. Pneumatic - has air filled spacese.g. cranial bones.
Structure of a long bone 1. Shaft a. Hollow cylinder of compact bone. b. Central cavity contains bone marrow -- production of blood cells. 2. Epiphyses. a. Surface of compact bone. b. Central areas are spongy bone -- contain bone marrow.