Skeletal System
Across
- 5. any of the minute tubes that form a network in bone and contain blood vessels.
- 7. freely movable joints exhibiting a joint cavity enclosed by a fibrous capsule lined with synovial membrane
- 9. Hard and dense, but not solid, bone tissue that is beneath the outer membrane of a bone.
- 11. allow only slight movement and consist of bones connected entirely by cartilage
- 13. shaft of a long bone
- 16. found in cancellous (spongy) bone; produces red and white blood cells and platelets
- 17. cartilaginous area at the ends of long bones where lengthwise growth takes place in the immature skeleton, and gradually ossifies
- 19. a bone cell, formed when an osteoblast becomes embedded in the matrix it has secreted.
- 21. mineral salts, 65% of bone by mass, Mainly calcium phosphate crystals, Responsible for hardness and resistance to compression in bones
- 23. Portion of the skeletal system that consists of the skull, rib cage, and vertebral column
- 24. formation of blood cells
- 25. found in the medullary canal and functions as storage for fat tissue; is inactive in the formation of blood cells; gradually replaces red bone marrow in adult bones
- 26. Protects and supports body organs and provides a framework the muscles use to support movement. Made up of bones and joints
- 27. consists of inflexible layers of dense connective tissue, holds the bones tightly together; immovable
Down
- 1. process of bone formation
- 2. ends of long bone
- 3. Concentric rings made up of groups of hollow tubes of bone matrix (plural of lamella)
- 4. Hairlike canals that connect lacunae to each other and the central canal
- 6. A hormone of the parathyroid gland that regulates the metabolism of calcium and phosphorus in the body.
- 8. covers the surfaces of bones where they come together to form joints
- 9. mature cartilage cells
- 10. A dense fibrous membrane covering the surface of bones (except at their extremities) and serving as an attachment for tendons and muscles.
- 12. cell that breaks down bone
- 14. cavity within the shaft of the long bones filled with bone marrow
- 15. Layer of bone tissue that has many small spaces and is found just inside the layer of compact bone; also called cancellous bone
- 18. Bones of the limbs and limb girdles that are attached to the axial skeleton
- 20. structural and functional units of compact bone; contain lamellae, canaliculi, lacunae, and Haversian canal
- 22. bone forming cells
- 28. unmineralized bone matrix (resembles bone)