Ch 6 Bone Microanatomy Flashcards
Chondroblast function
Secrete the extracellular matrix of cartilage
Chondrocyte origin and function
They are chondroblasts which have surrounded themselves in cartilage matrix and function to maintain the cartilage matrix.
Hyaline cartilage: appearance, location, and function
Glassy appearance Between bones (joints) Serves at a model or precursor for bone growth
Fibrocartilage: Description, location, and function
Most durable
Very strong type of cartilage
Can be found in the spinal cord
Found in the Miniski in the knee
Elastic cartilage: Description
Most mobile type of cartilage
Describe Interstitial growth
growth from inside the tissue
Describe Appositional growth
Growth on outside of the tissue
Describe long bones
Longer than they are wide
Usually the bones of the limbs
Describe Short bones
Roughly equal in length and width
Describe Flat bones
Very broad but thin
Skull
Describe Irregular bones
Bones that don’t fit into any of the other categories
Describe Medullary cavity
yellow bone marrow, the middle of the bone
Describe Spongy bones
very pores, red bone marrow, where new bone marrow is produced
Describe Endosteum
internal covering (of medullary cavity)
Describe Periosteum
covers the superficial part of the bone except the articular regions
Describe Nutrient foramen
A hole in a bone where blood vessels and nerves travel through
Describe Osteoprogenitor cells
cells that haven’t become a bone cell yet but will become bone cells.
Describe Osteoblasts
Cells that make bone tissue by secreting osteoid
Describe Osteoid
Osteoblast secretion that forms into hardened bone tissue
Describe Osteocytes
mature cells within the bone that sense stress/strain within the bone
Describe Osteoclasts
Cells that dissolve or breakdown bone
Describe Osteon
the individual cylinders that run through the whole length of the bone
Describe Haversian system
the system of osteons
Central canal
Center of osteon where the nerves run through
