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Bone Growth and Joints. Bone growth and remodeling. Two (three) types of bone: Membrane bone – bone forming within connective tissue (=dermal bone) Neurocranium (skull), scapula Osteoblasts  osteoid  trabeculae (small beam). Types of bone (continued). Cartilage replacement bone

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bone growth and remodeling
Bone growth and remodeling
  • Two (three) types of bone:
  • Membrane bone – bone forming within connective tissue (=dermal bone)
    • Neurocranium (skull), scapula

Osteoblasts  osteoid  trabeculae (small beam)

types of bone continued
Types of bone (continued)
  • Cartilage replacement bone
    • Endochondral bone – bone that forms within cartilage
    • Perichondral bone – forms in CT on surface of bone
    • Long bones
slide5

Development of the femur in a late embryo or fetus of a mammal.

A – original cartilage being replaced by bone on periphery (perichondral bone)

original cartilage being replaced by bone within cartilage (endochondral bone)

Blue = cartilage

Purple = calcified cartilage

Pink = bone

slide6

B – enlarged detail of bone formation

Blue = cartilage

Purple = calcified cartilage

Pink = bone

notes on joints articulations
Notes on Joints (articulations)
  • Structure and function dependent upon:
    • Degree and direction of movement needed
    • Forces acting upon the joint
    • Nature of the material at articulation
      • C – C
      • B – B
      • C – B
classification based on overall movement and material

Sutural ligament

Periosteum

Dermal bone

Dermal bone

Classification based on overall movement and material
  • Synarthroses – restricted movement
    • Sutures

1. Coronal suture

functional synarthroses
Functional synarthroses
  • Reinforced – look at woodpecker skull

Not synarthroses

nasal

frontal

slide11

Basioccipital

Basisphenoid

Spheno-occipital

Synchondrosis

slide13
Sympases
    • Fibrocartilage
    • Some elastin

1.Symphysis mentalis

Also:

2.Synchondrosis sphenooccipitalis3.Synchondrosis intraoccipitalis anterior4.Fonticulus posterior5.Synchondrosis intraoccipitalis posterior

Pubic symphysis

diarthroses synovial joints
Diarthroses (synovial joints)
  • Lots of movement
    • Knee
    • Jaw
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