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Musculoskeletal
Ligaments, tendons, bone type/ structure, joints, disorders
| Term | Definition |
|---|---|
| Ligament | Joins bone to bone. |
| Example of ligament | Cruciate ligament |
| Tendon | Joins muscle to bone |
| Example of tendon | Achilles |
| Endoskeleton | Skeleton inside the organism |
| Example of endoskeleton | Humans |
| Exoskeleton | Skeleton outside the organs and muscles |
| Example of exoskeleton | Crab, insects |
| Two main types of bone | Compact bone Spongy bone |
| Components of compact bone | Hard and strong Has bone cells in a matrix of salts and protein (strength and flexibility) |
| Where compact bone is found | The shaft (diaphysis) and the end (epiphysis) of a bone |
| Components of spongy bone | More porous Hallow spaces containing red bone marrow. |
| Where spongy bone is found | Mostly found at the epiphysis |
| Long bones | Femur Tibia Fibula Humerus Ulna Radius |
| Head of the bone | Epiphysis |
| Shaft of the bone | Diaphysis |
| Periosteum | Membrane around the bone that contains blood vessels and nerves |
| What is found within the epiphysis? | Spongy bone Red bone marrow |
| What is found within the diaphysis (cavity) | Medullary cavity, containing yellow bone marrow |
| Function of yellow bone marrow | To store fat |
| Function of red marrow | Makes Blood cells |
| Joint definition | A joint is where two or more bones meet |
| Three types of joints | Immoveable joints Slightly moveable joints Synovial joints |
| Immoveable joints | Fixed/fused |
| Example of Immoveable joint | Bones in the skull |
| Slightly moveable joints example | Joints between the vertebrae in the upper spine. |
| Gliding joint | Bones slide over each other |
| Example of gliding joint | Wrist |
| Criteria of Synovial joints (3) | End of bones are covered with cartilage Bone separated by a cavity Bones held together by ligaments |
| Function of synovial fluid | Lubricates the joint and prevents friction |
| What are synovial joints enclosed in? | Synovial membrane (which secretes synovial fluid) |
| Types of synovial joints | Ball and socket joint Hinge joints |
| Components of ball and socket joint | Allows movement in all directions Unable to support heavy loads |
| Example of ball and socket joint | Shoulder, hips |
| Components of hinge joints | Allows movement in only one direction Can support heavy loads |
| Example of hinge joints | Elbow, knee, finger |
| Two musculoskeletal disorders | Arthritis Osteoporosis |
| Arthritis | Inflammation of joints, cartilage wearing down between joints |
| Cause of arthritis | Wear and tear, genetic |
| Prevention for arthritis | Proper footwear, swimming rather than running |
| Treatment of arthritis | No cure Rest, mobility exercises/ physiotherapy, weight loss, anti-inflammatory medication |
| Osteoporosis | Brittle bone disease Bones become porous and lose density, weak and break easily |
| Cause of osteoporosis | Hormonal cause - lack of oestrogen in post menopausal women Genetic Diet |
| Prevention | Exercise High calcium diet |
| Treatment | Dietary supplements- calcium, vitamin D, HRT |