Ch.7 part 4 anatomy Flashcards
What is perforating canals?
Structure in long bone and perpendicular; connect central canals within different osteons
What are circumferential lamellae?
Runs the entire circumference of the bone
What are circumferential lamellae? (external)
Rings of bone run immediately internal to periosteum
What are circumferential lamellae? (internal)
Rings of bone run internal to the endosteum
What are interstitial lamellae?
Components of compact bone between osteons or partially resorbed osteons
Structure of hyaline cartilage
Avascular (hard to heal) and contains no nerves, resilient and flexible
Hyaline cartilage and articular function
Reduce friction
Chondroblasts
Produce cartilage matrix; dense regular CT
Chondrocytes
Maintain the matrix; contains lacunae
Perichondrium
Covers hyaline cartilage and helps maintain its shape, dense irregular CT
What is interstitial growth?
Growth in length and internal regions of cartilage
What is appositional growth?
Growth in width and layout material on outside and eat away on inside
What is ossification?
Formation and development of bone CT and begins in the embryo
What is intramembranous ossification?
Bone growth within a membrane, dermal ossification, creates diploe
What does intramembranous ossification produce?
Flat bones of skulls, some facial bones, mandible, central part of the clavicle
What is endochondral ossification?
Inner cartilage of hyaline and produces most bones of skeleton (long bones)
Woven bone in intramembranous ossification
Primary bone - lines up a lot of spongy bone
Lamellar bone
Secondary bone - becomes compact bone
Primary ossification center forms in
Diaphysis
Secondary ossification centers form in
Epiphysis (ends of long bone)
