Histology of bone

periosteum

thick, fibrous membrane that covers the outside of a bone; anchors tendons & ligaments; contains blood vessels, nerves, & lymph vessels

spongy bone

found in the ends of long bones; characterized by irregular spaces filled with red bone marrow that makes blood cells; helps keep bones light in weight

compact bone

dense, hard bone forming the shaft of long bones & the outer layer of other bones

epiphyseal plate

thin band of cartilage that is the growth zone between areas of ossification

Periosteum

Identify the membrane that covers the bone seen at the pointer

Osteon

Identify the structure at #1

Circumfrential lamellae

Identify the structure at #5

Concentric lamellae

Identify the structure at #3

Perforating canal

Identify the structure at #6

Central canal

Identify the structure at the pointer

Canaliculi

Identify the structure at the blue pointers that are microscopic canals from lacuna to lacuna

Osteocytes

Identify the dots at the blue pointers

Lacunae

Identify the spaces at the blue pointers

Interstitial lamellae

Identify the structure at the shadowed area with the star

Osteon

Identify the entire structure at the pink structure

Concentric lamellae

Identify the structure at the yellow circles

Central canal

Name the space at the pink pointer

Canaliculi

Name the structure at the blue lines

Osteocyte

Name the dots inside the circled structures

Lacuna

Name the spaces that are circled

Interstitial lamellae

Name the structure in the highlighted area

Intramembranous ossification timeline

occurs during fetal life

Intramembranous ossification location

mandible, clavicle, and cranial bones ( frontal, parietal, temporal, and occipital)

intamembranous ossification

bone tissue differentiates from fibrous membrane (mesenchyme become osteoblasts)

Intramembranous ossification process

ossification starts in the center of bone, moves towards edges

Intramembranous ossification image