Skeletal System Crossword

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Across
  1. 2. A cell that secretes the matrix for bone formation.
  2. 3. Double-layer connective tissue that covers and nourishes the bone.
  3. 4. Also known as ependymal canal, is the cerebrospinal fluid-filled space that runs longitudinally through the length of the entire spinal cord.
  4. 11. Freely moving joint exhibiting a joint cavity; also called a diarthrosis.
  5. 12. A freely moveable joint (diarthrosis) that allows only rotary movement around a single axis.
  6. 13. Are connected by dense connective tissue consisting mainly of collagen. These joints are also called fixed or immovable joints because they do not move.
  7. 14. Is a synovial joint where one of the bones forming the joint is shaped like a saddle with the other bone resting on it like a rider on a horse.
  8. 19. A space between the bones of the skull in an infant or fetus, where ossification is not complete and the sutures not fully formed.
  9. 21. The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate.
  10. 23. Are connected entirely by cartilage; allow more movement between bones than a fibrous joint but less than the highly mobile synovial joint.
  11. 25. Is a synovial joint which, under physiological conditions, allows only gliding movement.
  12. 26. A disease of children caused by vitamin D deficiency, characterized by imperfect calcification, softening, and distortion of the bones typically resulting in bow legs.
  13. 27. Bone marrow characterized by meshes of the reticular network that contain the developmental stages of red blood cells, white blood cells, and megakaryocytes.
  14. 30. A break in the bone.
  15. 32. Cartilage that contains fibrous bundles of collagen, such as that of the intervertebral disks in the spinal cord.
  16. 33. Large cells that resorb or break down bone matrix.
Down
  1. 1. A medical condition in which the bones become brittle and fragile from loss of tissue, typically as a result of hormonal changes, or deficiency of calcium or vitamin D.
  2. 4. dense bone in which the bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes, or bone cells.
  3. 5. Is an ovoid articular surface, or condyle that is received into an elliptical cavity. This permits movement in two planes, allowing flexion, extension, adduction, abduction, and circumduction.
  4. 6. A chronic progressive disease causing inflammation in the joints and resulting in painful deformity and immobility, especially in the fingers, wrists, feet, and ankles.
  5. 7. The appendicular skeleton is composed of 126 bones of the limbs and the pectoral and pelvic girdles by which they connect to the axial skeleton.
  6. 8. Is a common class of synovial joint that includes the ankle, elbow, and knee joints. They are formed between two or more bones where the bones can only move along one axis to flex or extend.
  7. 9. A short band of tough, flexible, fibrous connective tissue that connects two bones or cartilages or holds together a joint.
  8. 10. The most abundant cartilage type in the body; provides firms support with pliability.
  9. 15. Is a lifelong process where mature bone tissue is removed from the skeleton (a process called bone resorption) and new bone tissue is formed.
  10. 16. Is a layer of synovial membrane around a tendon.
  11. 17. A disease in which defective metabolism of uric acid causes arthritis, especially in the smaller bones of the feet, deposition of chalkstones, and episodes of acute pain.
  12. 18. Has great flexibility so that it is able to withstand repeated bending. The chondrocytes lie between the fibres. It is found in the epiglottis (part of the larynx).
  13. 20. A natural or manufactured joint or coupling, such as the hip joint, in which a partially spherical end lies in a socket, allowing multi directional movement and rotation.
  14. 22. A bone cell, formed when an osteoblast becomes embedded in the matrix it has secreted.
  15. 24. The shaft or central part of a long bone.
  16. 28. The end part of a long bone, initially growing separately from the shaft.
  17. 29. Painful inflammation and stiffness of the joints.
  18. 31. A fluid-filled sac or saclike cavity, especially one countering friction at a joint.