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