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Across 1. ny of various canals in compact bone through which blood vessels, nerve fibers, and lymphatics pass. 6. Any of a group of bones having peculiar or complex forms, such as the vertebrae. 12. bone that is of approximately equal dimension in all directions 14. he marrow cavity in the shaft of a long bone. 16. small bones or cartilages formed in tendons, like the patella and pisiform in man. 17. any of several soft membranous gaps between the bones of the skull in a fetus or infant 19. the shaft of a long bone, between the epiphyses. 20. one of the to essential processes during fetal devolopement of the skeletal system in mammals by bone tissue is created and there is no cartilage present 22. The thin layer of cells lining the medullary cavity of a bone. 24. the thin plate of cartilage between the epiphysis and the metaphysis of a growing long bone. 25. Any of several elongated bones of vertebrate limbs that have a roughly cylindrical shaft containing marrow 26. The end of a long bone that is originally separated from the main bone by a layer of cartilage but that later becomes united to the main bone through ossification. 27. A branched cell embedded in the matrix of bone tissue. 28. a bone that is of approximately equal dimension in all directions

Down 2. the bones that together comprise the skull and the vertebral column 3. The bones of the limbs, including the bones of the pectoral and pelvic girdles. 4. The dense fibrous membrane covering the surface of bones except at the joints and serving as an attachment for muscles and tendons. 5. The formation of blood or blood cells in the living body. Also called hematogenesis, sanguification. 7. has a higher surface area but is less dense, softer, weaker, and less stiff than compact bone 8. cartilage that lines the joints. 9. Any of the supporting strands of connective tissue projecting into an organ and constituting part of the framework of that organ. 10. A cell from which bone develops; a bone-forming cell. 11. hard, dense bone that is usually found at the periphery of skeletal structures, as distinguished from spongy cancellous bone. 13. any bone that develops in and replaces cartilage 15. The natural process of bone formation. 18. The branch of medicine that deals with the prevention and correction of injuries or disorders of the skeletal system and associated muscles, joints, and ligaments, often by surgery. 21. A large multinucleate cell found in growing bone that resorbs bony tissue, as in the formation of canals and cavities. 23. flexible tissue interior to the bone