BIOL 207 Lecture Notes - Lecture 12: Reticular Connective Tissue, Bone Marrow, Bone
21 Oct 2016
School
Department
Course
Professor
Document Summary
Contain multipotent stem cells can give rise to osteoblasts (build bones) and osteoclasts (break down bone) = osteoprogenitor/osteogenic cells. Tufts of collagen fibers that extend through both layers. Periosteum: outer fibrous layer, inner vascular/osteogenic layer, sharpey"s/perforating fibers secure periosteum to underlying bone, functions, appositional growth, bone repair, nutrition of bone, point of attachment for tendons and ligaments. 1sparse layer of reticular connective tissue membrane covering internal bone surfaces and cavities as well as the trabeculae of cancellous bone. 1consists of an irregular lattice work of thin plates of bone called trabeculae along with large spaces between them called trabecular cavities filled with red bone marrow. Lie at right angles to the central canal and connect the blood and nerve supply of the periosteum to those in the central canal; not surrounded by lamellae but lined with endosteum. Osteogenesis/ossification: bone growth: intramembranous ossification, endochondral ossification. Occurs in flat bones (facial bones, cranial bones, clavicle)
