Bone Structure Crossword

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Across
  1. 2. Concentric rings or layers of extracellular matrix that surround the Central/Haversian canal within an osteon.
  2. 3. (Bone type) Bones that have a variety of complex shapes and are usually connected to several other bones (e.g., vertebrae, many facial bones).
  3. 5. (Bone type) Bones that have roughly equal lengths and widths (e.g., wrist and ankle bones).
  4. 6. The shaft or main, long part of a long bone, located between the epiphyses.
  5. 8. epiphysis The end of a long bone that is closer to the center of the body or point of attachment.
  6. 10. canal Canals that run perpendicular to the central canals, connecting them to each other and to the surface of the bone.
  7. 12. cavity The hollow chamber within the diaphysis of a long bone; contains bone marrow.
  8. 14. bone Tightly packed tissue that makes up the wall of the diaphysis; characterized by a continuous, solid extracellular matrix with few spaces.
  9. 17. Indentations or hollow areas in a bone that often articulate with other bones or serve as passageways for nerves and blood vessels.
  10. 18. (Haversian System) The microscopic structural unit of compact bone, consisting of a central canal, lamellae, lacunae, and canaliculi.
  11. 19. (Bone type) Bones that have long longitudinal axes and expanded ends (e.g., arm and leg bones).
  12. 20. cartilage Hyaline cartilage that covers the ends of bones (epiphyses) at the joint surfaces, reducing friction and absorbing shock.
  13. 22. An expanded end portion of a long bone; articulates with another bone and is covered by articular cartilage.
  14. 23. A thin membrane lining the inner surfaces of the medullary cavity and the spaces within spongy bone.
  15. 24. epiphysis The end of a long bone that is farther away from the center of the body or point of attachment.
  16. 25. marrow Soft, net-like mass of connective tissue that fills the medullary cavities of long bones and the spaces of spongy bone; site of blood cell formation (red marrow).
  17. 27. bone Bone tissue found in the epiphyses and lining the medullary cavity; consists of interconnecting plates called trabeculae with spaces between them.
  18. 28. A mature bone cell, completely surrounded by the bony matrix, that occupies a lacuna and helps maintain the bone tissue.
Down
  1. 1. canal A tube at the center of an osteon that contains blood vessels and nerves.
  2. 4. matrix The non-living material surrounding the bone cells, primarily composed of collagen and inorganic salts (calcium phosphate), giving bone its hardness and resilience.
  3. 7. A tough, vascular covering of fibrous connective tissue that completely encloses the bone, except for the area of articular cartilage.
  4. 9. Bony plates or bars that make up the framework of spongy bone; they are arranged to resist stress.
  5. 11. (Bone type) Bones that are plate-like structures with broad surfaces (e.g., ribs, scapulae, some skull bones).
  6. 13. Tiny, bony chambers or hollow cavities where osteocytes reside.
  7. 15. Small, narrow passageways or tiny canals that connect adjacent lacunae and allow osteocytes to communicate and receive nutrients.
  8. 16. (Bone type) A special type of short bone that is small and nodular and develops within a tendon or adjacent to a joint (e.g., patella/knee cap).
  9. 21. Depressions or channels in a bone surface that often provide a passageway for blood vessels, nerves, or tendons.
  10. 26. processes Projections or bumps on a bone that serve as sites for muscle, tendon, or ligament attachment; can also form joints.