Skeletal and Muscular System- HBS Unit 1

123456789101112131415161718192021222324252627282930313233343536373839
Across
  1. 3. Sustained muscle contraction without relaxation.
  2. 4. Mature bone cell that maintains bone tissue.
  3. 7. Thin protein filament involved in muscle contraction.
  4. 9. Threadlike structure within muscle fibers containing actin and myosin.
  5. 11. Natural opening or hole in bone for nerves or blood vessels.
  6. 14. Smooth, flexible connective tissue that reduces friction at joints.
  7. 15. Muscle that contracts under conscious control.
  8. 19. Flat bone in the center of the chest connecting ribs.
  9. 20. skeleton Portion of the skeleton forming the skull, spine, and rib cage.
  10. 23. bone Lighter, porous bone tissue containing red marrow.
  11. 24. joint Freely movable joint lubricated by fluid.
  12. 25. bone Dense, strong type of bone found in the shaft of long bones.
  13. 26. Soft tissue in bones that produces blood cells.
  14. 29. Muscle that opposes the action of another.
  15. 30. Movement of a limb away from the midline.
  16. 31. The end of a long bone.
  17. 32. A break or crack in a bone.
  18. 33. Decreasing the angle between two bones.
  19. 35. Dense connective tissue covering the surface of bones.
  20. 36. The shaft or main portion of a long bone.
  21. 38. Increase in muscle size due to exercise.
  22. 39. Appearance of skeletal and cardiac muscle under a microscope.
Down
  1. 1. Connective tissue that attaches bone to bone.
  2. 2. Increasing the angle between two bones.
  3. 5. Movement of a limb toward the midline.
  4. 6. Series of bones forming the backbone.
  5. 8. Connective tissue that attaches muscle to bone.
  6. 10. Muscle that works automatically, such as cardiac or smooth muscle.
  7. 12. junction Synapse where a motor neuron communicates with a muscle fiber.
  8. 13. Cell that breaks down bone tissue for remodeling.
  9. 16. skeleton Portion of the skeleton that includes limbs and girdles.
  10. 17. Thick protein filament that binds to actin during contraction.
  11. 18. Regulatory protein that blocks actin binding sites when muscle is relaxed.
  12. 21. Decrease in muscle size due to disuse.
  13. 22. The movable attachment point of a muscle.
  14. 27. Bone-building cell that secretes matrix.
  15. 28. The basic contractile unit of muscle fiber.
  16. 34. The fixed attachment point of a muscle.
  17. 37. Immovable joint between skull bones.