... sections of bone taken from different sites, you find two different architectural arrangements. Dense, or compact bone is relatively solid, whereas spongy, or cancellous bone resembles a network of bony shafts separated by marrow spaces. In both types of bone the individual bone cells, or osteocytes, reside within small pockets called lacunae. These lacunae are found between narrow sheets of ... or remodeling is underway. The endosteal lining is not a complete epithelium, and the matrix is occasionally exposed. At these sites are found osteoclasts. Acids secreted by osteoclasts dissolve t...

• Word Count: 5684
• Approx Pages: 23
• Has Bibliography
• Grade Level: Undergraduate

... degenerative joint disease. This involves the long-term destruction of cartilage in joints and the enlargement of the joint ends of bones. A characteristic sign of osteoarthritis is the development of bony spurs near joints, visible on X rays. The development of osteoarthritis is related to aging, but the direct cause is unknown. Genetic, metabolic, and endocrine factors have been suggested as possible ... ...

• Word Count: 3277
• Approx Pages: 13
• Grade Level: Undergraduate

... bone matrix during development, however in this not true of the cartilaginous joints in the ribs. Thus sychondroses are synarthroses (immovable) in function. Secondary cartilaginous joints are more complex. Each bony surface is covered by a thin layer of hyaline cartilage and between the layers of hyaline cartilage is sandwiched a layer of fibro cartilage. This structure allows some flexibility of the bone ... ...

• Word Count: 1373
• Approx Pages: 5
• Grade Level: Undergraduate