Across
- 3. Composed of long, needle-like pieces of bone and lots of open space.
- 4. radiate outward from the central canals to all lacunae;
- 6. this area forms blood cells and red marrow is found there; in adult bones, red marrow is confined to cavities in the spongy bone of flat bones and epiphyses of some long bones.
- 9. the cavity of the shaft is primarily a storage area for adipose (fat) tissue called the yellow marrow, or medullary, cavity.
- 13. The structure of a long bone is shown both through gross anatomy and microscopic anatomy.
- 15. are found within the matrix in tiny cavities called lacunae.
- 16. The ends of the long bone; each epiphysis consists of a thin layer of compact bone enclosing an area filled with spongy bone.
- 17. Bones that do not fit one of the preceding categories are called irregular bones.
- 18. Makes up most of the bone’s length and is composed of compact bone; it is covered and protected by a fibrous connective tissue membrane, the periosteum.
Down
- 1. a thin line of bony tissue spanning the epiphysis that looks a bit different from the rest of the bone in the area;
- 2. The communication pathway from the outside of the bone to its interior (and the central canals) is completed by perforating (Volkmann’s) canals, which run into the compact bone at right angles to the shaft.
- 3. Generally cube-shaped and mostly contains spongy bone; sesamoid bones, which form within tendons, are a special type of short bone.
- 5. Typically longer than they are wide; as a rule, they have a shaft with heads at both ends, and are mostly compact bone.
- 7. Hundreds of connective tissue fibers called perforating or Sharpey’s, fibers secure the periosteum to the underlying bone.
- 8. Dense and looks smooth and homogeneous
- 10. arranged in concentric circles called lamellae around central (Haversian) canals.
- 11. surfaces are not smooth but scarred with bumps, holes, and ridges; these bone markings reveal where muscles, tendons, and ligaments were attached and where blood vessels and nerves passed.cartilage A periosteum, covers its external surface; because the articular cartilage is glassy hyaline cartilage, it provides a smooth, slippery surface that decreases friction at joint surfaces.
- 12. Thin, flattened, and usually curved; they have two thin layers of compact bone sandwiching a layer of spongy bone between them.
- 14. A complex consisting of central canals and matrix rings is called an osteon, or Haversian system.