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Musculoskeletal
Musculoskeletal System
| Term | Definition |
|---|---|
| Musculoskeletal System | provides the framework for the body and allows the body to move. This system also protects the body and gives it shape |
| Bones | hard, rigid structures that are made up of living cells surrounded by minerals that have been deposited by the living cells |
| periosteum | A thin but strong membrane, covers the entire surface of every bone in the body and merges with the ligaments and tendons that attach to the bones. |
| compact bone | The hard, dense layer of bone that forms the surface of every bone is called |
| a softer, less dense form of bone called | spongy bone (trabecular bone) |
| how many bones in the human body | 206 |
| Long bones | hard and dense bones that provide strength, structure, and mobility. |
| Short bones | allow skill and ease in movement. The bones in the wrists and ankles are short bones |
| Flat bones | thin, flat, and curved bones that protect the organs. Such bones include the ribs and sternum (breastbone), |
| Irregular bones | irregularly shaped bones with various bony projections and features that interact with other bones. These bones provide sites for muscle attachment and allow various degrees of movement and flexibility, along with some support. They include the hip bones, vertebrae |
| Sesamoid bones | usually short or irregular bones that are imbedded in a tendon and protect the tendon. These bones include the patella (knee cap) |
| Joints | A joint is the point at which two or more bones meet |
| Cartilage | connective tissue that cushions the joint so that bone ends do not rub together. |
| The synovial membrane | lines the joint and secretes synovial fluid, which acts as a lubricant so that the joint can move smoothly. |
| ligaments. | Bones are held together at the joint by strong bands of connective tissue called |
| Articular cartilage | lines the articulating surface of each of the two bones, forming a smooth surface within the joint |
| Joint capsule | made up of fibrous connective tissue, enclosing the joint in a strong sleevelike covering |
| Synovial membrane | lines the joint capsule and secretes lubricating synovial fluid into the joint cavity |
| Synovial fluid | lubricates the bones in the joint and decreases the friction within the joint |
| Bursae (singular: bursa) | small sacs of synovial fluid that function as a cushion and gliding surface between the joint and the tendons that cross over the joint (excessive use of the joint may cause a painful inflammation of the bursae, known as bursitis) |
| Ball-and-socket joint | allows movement in all directions. It is made up of the rounded end of one bone and a hollow cavity or depression in another bone |
Created by:
ReneeStewart
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