Week 2.1 Class-Spine and Limbs & Joints PDF

1. Supports the body HSCI 10280, MWKC, Winter 2025  By legs and pelvic girdle 2. Protects the soft body parts  Skull protects: Brain  Ribcage protects: Heart and Lungs  Vertebrae protect: Spinal Cord 3. Produces blood cells  Cells produced by ste...

1. Supports the body HSCI 10280, MWKC, Winter 2025  By legs and pelvic girdle 2. Protects the soft body parts  Skull protects: Brain  Ribcage protects: Heart and Lungs  Vertebrae protect: Spinal Cord 3. Produces blood cells  Cells produced by stem cells in red bone marrow 4. Stores minerals (calcium and phosphate) and fat 5. Allows for movement by attaching muscles 1  1. Compact bone ◦ Highly organized - composed of osteons (or with a central canal containing blood vessels ◦ Densest and toughest near the external surface Makes up bulk of the shaft in long bones ◦ Protection, support, and resistance to external stressors outside HSCI 10280, MWKC, Winter 2025 2  2. Spongy bone ◦ Also called -Trabecular bone – appears unorganized strong light weight steel beams ◦ Found in the epiphysis (ends) of long bones HSCI 10280, MWKC, Winter 2025 3 HSCI 10280, MWKC, Winter 2025  Bone is constantly changing ◦ Repairing minor cracks ◦ It respond to the stress we give it  Weight training/bearing  Recycle 5-7% of bone mass each week ◦ Spongy bone replaced ~ every 3-4 years ◦ Compact bone replaced ~ every 10 years 4  Osteoblasts – bone-forming cells  Osteoclasts – breaking down cells  Osteocytes – mature bone cells that maintain bone structure derived from osteoblasts, sense change  https://www.youtube.com/watch?v=P8OtBv775m Q&t=11s HSCI 10280, MWKC, Winter 2025 5 · Blood cells only live 180 days · New Blood formation happens in red bone marrow HSCI 10280, MWKC, Winter 2025 6   Axial skeleton – midline of body  Appendicular skeleton – limbs & their girdles  Bones in green = axial skeleton  Bone in red = appendicular skeleton HSCI 10280, MWKC, Winter 2025 7  Commonly known as the spine.  Function of the vertebral column?  How many vertebrae?  7 - 12 - 5  Atlas and Axis  Separated by intervertebral discs  Functions of these discs?  What is a herniated ‘slipped’ disc? HSCI 10280, MWKC, Winter 2025 8 HSCI 10280, MWKC, Winter 2025 9 Note - these curvatures are considered “Abnormal” only if the curve is larger than normal Although Scoliosis is considered abnormal – many people have