Clopton Havers researched the internal structure of these objects and names some canals in them.
The density of these structures is measured using DXA, or dual-energy X-ray absorptiometry, and can be increased by bisphosphonates. The cells that degrade these objects have a membrane called a ruffled border. Their namesake morphogenetic proteins were discovered by Marshall Urist and belong to the TGF-beta superfamily. Clopton Havers researched the internal structure of these objects and names some canals in them. There are compact and spongy types of these objects, and specific examples of them include the malleus, incus, and stapes. Red and yellow are the two types of marrow found in their interior. For 10 points, name these objects affected by osteoporosis. 
The density of these structures is measured using DXA, or dual-energy X-ray absorptiometry, and can be increased by bisphosphonates.
bones