HBS: Joints and Muscles Questions And Answers Graded A+

joints - are the places where two bones meet and allow movement & flexibility articulations - the ways bones come together fibrous joints - Immovable joints; Held together with very strong ligaments; ex- Sutures in skull and between teeth in mandible/maxilla cartilaginous joints - Partially moveable; Held together with slightly flexible cartilage; ex- Vertebra and ribs to sternum synovial joints - Freely moveable; Filled with synovial fluid (reduces friction); ex- Hips/shoulders, knees/elbows, wrists/ankles, fingers hinge joint example - ex: elbow, knee, fingers ball and socket example - ex: shoulders and hips pivot joint example - ex: neck and forearm gliding joint example - ex: carpals and tarsals saddle joint example - ex: thumb condyloid joint (elipsoidal) example - ex: fingers to hand bones - provide support and shapemuscles - provide movement; there are about 650 of them and they make up 50% of the body's weight cartilage - Cushions/protects bones where they meet and rub against each other; provides structure to ears, nose, and other organs ligaments - fasten bones to other bones cardiac muscle - Striated; Multinucleated; Intercalated discs; Involuntary; Form wall of heart skeletal muscle - Striated; Multinucleated; Voluntary; Attach to bones through tendons; Move bones; Tire easily smooth muscle - Non-striated; Single nucleus; Involuntary; Forms walls of digestive system and arteries; Do not tire easily epimysium - the outermost layer of connective tissue