Lamellae surrounding a vertically oriented haversian

lamellae ) surrounding a
vertically oriented Haversian canal (central canal) which
contains blood vessels and nerves .
C
OMPACT
B
ONE
From Visual Anatomy & Physiology, 1e
Martini/Ober/Nath

9/29/13
6
C
OMPACT
B
ONE

Lamellae: the concentric rings of calcified matrix
surrounding a vertically oriented blood vessel.

Interstitial lamellae: represent older osteons that have been
partially remove d during tissue remodelling .

Circumferential lamellae: encircle bone beneath the
periosteum and encircle the medullary cavity .
C
OMPACT
B
ONE

Osteocytes in spaces called lacunae .

Osteocytes communicate through canaliculi ,
filled with extracellular fluid , that connect one
cell to the next.

7
.
;

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8
B
LOOD AND
N
ERVE
S
UPPLY

Bone is highly vascular .

Periosteal arteries:

Supply the periosteum .

Nutrient arteries:

Enter through nutrient
foramen .

Supply the compact bone of
diaphysis , spongy bone, and red
bone marrow.

Metaphyseal and
epiphyseal arteries:

Supply the red marrow and
bone tissue of epiphyses .
B
LOOD AND
N
ERVE
S
UPPLY

Veins:

Blood leaves diaphysis through nutrient
veins , which exit beside nutrient artery .

Similar arrangement to arteries in periosteum,
epiphyses and metaphyses.

Nerves:

Nerves accompany blood vessels.

Periosteum rich in sensory nerves (many pain
receptors ).
B
ONES

There are 4 types of situations in which we need
to form bone:
1.
Bone formation (ossification or osteogenesis) in an
embryo or fetus.
2.
The growth of bones from infancy to adolescence.
3.
Remodeling of bones throughout life.
4.
Repair of fractures.
I
NITIAL
B
ONE
F
ORMATION

Ossification ( osteogenesis ) : formation of bone .