Osteocytes produce the bone matrix in which they reside. Given that bone is incredibly strong, these cells reside in small spaces termed lacuna. This bone tissue is made up of collagen fibers embedded in calcium phosphate providing it toughness devoid of brittleness. There's two varieties of bone: compact and spongy. https://patriot-gold-bbb08912.total-blog.com/5-simple-statements-about-adaptability-living-environment-explained-59265538