Module 3-A. Bones, Cartilage, and Joints Flashcards
A dynamic organ that functions to provide support, protection, and also act as a reservoir of mineral salts and growth factors.
Bone
Thin layer of cartilage covering an epiphysis
Articular cartilage
where two bone surfaces meet
Articulation
Channels within the bone matrix that house one of an osteocyte’s many cytoplasmic extensions that it uses to communicate and receive nutrients
Canaliculi
Longitudinal channel in the center of each osteon; contain blood vessels, nerves, and lymphatic vessels; also known as Haversian Canal
Central canal
Dense bone that forms the cortical region of bone
Compact bone
Tubular shaft that runs between the proximal and distal ends of a long bone
Diaphysis
Layer of spongy bone, that is sandwiched between two layers of compact bone found in flat bones
Diploë
Delicate membranous lining of a bone’s medullary cavity
Endosteum
Sheet of hyaline cartilage in the metaphysis of an immature bone; replaced by bone tissue as the organ grows in length
Epiphyseal plate
Wide section at each end of a long bone; filled with spongy bone and red marrow
Epiphysis
Opening or depression in a bone
Hole
Spaces in a bone that house an osteocyte
Lacunae
Hollow region of the diaphysis; filled with yellow marrow
Medullary cavity
small opening in the middle of the external surface of the diaphysis, through which an artery enters the bone to provide nourishment
Nutrient foramen
the process of bone formation in which a cartilage model becomes almost entirely replaced by bone preceding the formation of the actual bone
Endochondral ossification
the microscopically dense parallel array of bone
Lamellar bone
this is the process of bone formation in which bones are directly laid in opposition on top of the bone that has just formed
Membranous ossification
is the process that is responsible for changing the size and shape of bony tissue
Modelling
Mesenchymal cells that contribute to bone production and can be seen lining bone surfaces
Osteoblasts
Smaller elongated cells contained within small cavities in bone called lacunae
Osteocytes
Hematopoietic derived, multinucleated cells that resorb bone
Osteoclasts
A tubular functional unit of lamellar cortical bone
Osteons
The process that is responsible for bony tissue maintenance
Remodelling
Bone that forms multi-directional, anastomosing struts within the marrow cavity
Trabecular bone
Rapidly deposited randomly arranged arrays of bone
Woven bone
Give the functions of bones
- Support
- Protection
- Assisting movement
- Mineral homeostasis
- Blood cell porduction
Cells that are involved in growing bone:
Osteoprogenitor cells
Osteoblasts
Osteocytes