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Skeletal System
Skeletal System for HOSA
| Question | Answer |
|---|---|
| oss/e, oss/i, oste/o, ost/o | Bones-Act as the framework for the body, protect the internal organs, and store calcium. |
| myel/o | Bone Marrow - Red bone marrow helps form red blood cells. Yellow bone marrow stores fat. |
| chondr/o | Cartilage - Creates a smooth surface for motion within the joints and protects the ends of the bones |
| arthr/o | joints - Work with the muscles to make a variety of motions possible. |
| ligament/o | Ligament - Connect one bone to another |
| synovi/o, synov/o | Synovial Membrane -Forms the lining of synovial joints and secretes synovial fluid. |
| synovi/o, synov/o | Synovial Fluid -Lubricant that makes smooth joint movements possible. |
| Burs/o | Bursa-Cushions areas subject to friction during movement. |
| Periosteum | is the tough, fibrous tissue that forms the outermost covering of bone |
| Compact bone | also known as cortical bone, is the dense, hard, and very strong bone that forms the pro- tective outer layer of bones. |
| Spongy bone | aka cancellous bone, porous, which makes it lighter and weaker than compact bone. Red Bone Marrow |
| Lone Bones | Major bones of the arms and legs; femur and humerus |
| Short Bones | Bones of the wrist and ankle. Made up of spongy bone covered with a layer of compact bone. |
| medullary cavity | is the central cavity located in the shaft of long bones, where it is surrounded by compact bone. Red and Yellow bone marrow are stored here |
| endosteum | is the tissue that lines the medullary cavity |
| Red bone marrow, | located within the spongy bone, is a hematopoietic tissue that manufactures red blood cells, hemoglobin, white blood cells, and throm- bocytes |
| Hematopoietic | means pertaining to the formation of blood cells |
| -poietic | pertaining to formation |
| Yellow bone marrow | functions as a fat storage area. It is composed chiefly of fat cells and is located in the medullary cavity of long bones. |
| Cartilage | is the smooth, rubbery, blue- white connective tissue that acts as a shock absorber between bones. |
| Articular cartilage | covers the surfaces of bones where they articulate, or come together, to form joints.smooth joint movement possible and protects the bones from rubbing against each other |
| meniscus | is the curved, fibrous cartilage found in some joints, such as the knee and the temporomandibular joint of the jaw |
| diaphysis | is the shaft of a long bone |
| epiphyses | re the wider ends of long bones such as the femurs of the legs |
| proximal epiphysis | end of the bone located nearest to the midline of the body. |
| distal epiphysis | end of the bone located farthest away from the midline of the body. |
| foramen | opening in a bone through which blood vessels, nerves, and ligaments pass |
| process | normal projection on the surface of a bone that most commonly serves as an attachment for a muscle or tendon. |
| Joints; Articulations | are the place of union between two or more bones. |
| Fibrous joints | consisting of inflexible layers of dense connective tissue, hold the bones tightly together. |
| Sutures | allow little or no movement in adults |
| fontanelles; soft spots | are normally present on the skull of a newborn. These flexible soft spots facilitate the passage of the infant through the birth canal. |
| Cartilaginous joints | allow only slight movement and consist of bones connected entirely by cartilage |
| sternum | Breast bone |
| pubic symphysis | allows some movement to facilitate childbirth. Pubic bones in the anterior of the pelvis. |
| synovial joint | is created where two bones articulate to permit a variety of motions. |
| Ball-and-socket joints | hips and shoulders, allow a wide range of movement in many directions |
| ■ Hinge joints | knees and elbows, are synovial joints that allow movement primarily in one direction or plane |
| synovial capsule | the outermost layer of strong fibrous tissue that resembles a sleeve as it surrounds the joint. |
| synovial membrane | lines the capsule and secretes synovial fluid. |
| Synovial fluid | which flows within the synovial cavity, acts as a lubricant to make the smooth movement of the joint possible |
| ■■ ■■ Ligaments | are bands of fibrous tissue that form joints by connecting one bone to another bone or by joining a bone to cartilage. |
| bursa | is a fibrous sac that acts as a cushion to ease movement in areas that are subject to friction, such as in the shoulder, elbow, and knee joints where a tendon passes over a bone |
| Adult Skeleton | 206 Bones |
| axial skeleton | protects the major organs of the nervous, respiratory, and circulatory systems. 80 bones of the head and body are organized into 5 parts |
| Axial Skeleton | (1) the bones of the skull; (2) the ossicles (bones) of the middle ear; (3) the hyoid bone, located on the throat between the chin and the thyroid; (4) the rib cage; and (5) the vertebral column. |
| appendicular skeleton | makes body movement possible and also protects the organs of digestion, excretion, and reproduction. 126 Bones are organized. |
| upper extremities | shoulders, arms, forearms, wrists, and hands |
| lower extremities | (hips, thighs, legs, ankles, and feet |
| appendage | anything that is attached to a major part of the body |
| skull | consists of the 8 bones that form the cranium, 14 bones that form the face, and 6 bones in the middle ear. |
| cranium |