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What are the five functions of the skeletal system?
3. Hematoposesis (production of blood cells) - red bone marrow
Describe the periosteum.
1. Dense connective tissue.
2. Covers outer bone surface, except joints.
3. Continuous with ligaments and tendons
4. Contains blood cells and osteoblasts.
Describe spongy bone tissue.
Tiny plates of bone with spaces inbetween.
Filled with red marrow.
Most in epiphysis (Ends of the bone)
Circumferntial Lamellae are...?
Layers of bone tissue that wrap around the circumferance of the bone.
What is intramembranous ossification?
Forms the mandible clavicle, calvaria. (Finishes are Week 5)
Osteoblasts gather and then secrete mesenchyme.
Osteoblasts become osteocytes.
Vessels in developing periosteum bring osteoblasts- lay down thin layer of compact over sponge bone.
What is Endocrhondral Ossification?
Finishes at Week 8. Forms all other types of bone. Chondroblast produe hyaline cartilage in the same shapes as bones. Many chrondrocytes die, some change into osteoblasts.
What is the thing layer of cartilages that remains at the corder of the epipysis and diaphysis?
epith plate. (aka growth plate)
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