Histology of Bone Flashcards
These function in the formation of bone, as well as in the repair and modeling of bone.
Osteoblasts “bone-forming cells” (periosteum and endosteum contain osteoblasts)
When osteoblasts become surrounded by matrix, they are referred to as ___________.
Osteocytes “bone cells”
These contribute to bone repair and remodeling by removing existing bone, called bone absorption.
Osteoclasts “bone-destroying cells”
Thin sheets of extracellular matrix where bone forms
Lamellae
A space in bone matrix in which an osteocyte is located.
Lacunae
A tiny canal in bone between osteocytes containing osteocyte cell processes
Canaliculus “little canal”
Two Major Types of Bone Tissue
Compact Bone and Spongy Bone
Type of bone tissue that is mostly solid matrix and cells. It forms the perimeter of the diaphysis of a long bone and the thinner surfaces of all other bones.
Compact bone “cortical bone”
Type of bone tissue that consists of a lacy network of bone with many small, marrow-filled spaces.
Spongy bone
Central canal is also known as Haversian canal
True
Osteocytes are located in lacunae between the lamellae of each osteon.
True
This bone tissue forms the perimeter of the diaphysis of a long bone and the thinner surfaces of all other bones.
Compact bone “cortical bone”
This bone tissue is very porous and is located in the epiphyses of long bones and lines the medullary cavity of long bones.
Spongy bone (it has less bone matrix and more open spaces than the compact bone)
This bone tissue consists of delicate interconnecting rods or plates of bone called “trabeculae”.
Spongy bone
It adds strength to a bone without the added weight that would be present if the bone were solid mineralized matrix.
Trabeculae
