V1 - 4. osteoblasts surrounded --> osteocytes 5....

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
V. Microanatomy of Spongy (Cancellous) Bone A. General Features 1. many spaces filled with red marrow (not yellow) 2. most of epiphysis of long bones in adult 3. found in short, flat, irregular bones B. Trabecular Lattice Structure 1. trabeculae - irregular, sponge-like network 2. lacunae - spaces within trabeculae for osteocytes 3. spaces - filled with red marrow (hematopoiesis) VI. Ossification: The Formation of Bone During Development A. Different Cells Involved 1. mesenchymal cells - migrate to location in embryo 2. chondroblasts - cartilage formation 3. osteoblasts - bone formation B. Intramembranous Ossification (from fibrous membrane) 1. ossification center - where osteoblasts concentrate 2. osteoblasts secrete collagen fibers for matrix 3. calcification - Ca salts secreted to cement matrix
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 4. osteoblasts surrounded --> osteocytes 5. trabeculae - result when hardened bone forms 6. spongy bone now in place with red marrow 7. in time, spongy bone reconstructed -> compact bone C. Endochondral Ossification (replacing hyaline cartilage) 1. cartilage "bone model" formed in the embryo 2. perichondrium - membrane around the cartilage 3. vessel penetrates cartilage, brings osteoblasts 4. cartilage converted into compact bone 5. perichondrium --> periosteum 6. chondrocytes gradually hypertrophy and die 7. vessels move into space and convert to bone 8. primary ossification center - in diaphysis 9. secondary ossification center - in epiphysis 10. epiphyseal plate - between the two, still cartilage...
View Full Document

This note was uploaded on 01/29/2012 for the course SCIE SYG2000 taught by Professor Bernhardt during the Fall '10 term at Broward College.

Page1 / 2

V1 - 4. osteoblasts surrounded --> osteocytes 5....

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online