Lab Oral #3 Flashcards
Bone is a type of
Connective tissue
Bone is arranged at the microscopic level into systems called
Osteons
Osteon is
Basic functional & structural unit of mature compact bone
Osteons run parallel to
The diaphysis of the long bone
Each osteon has a central (or haversion) canal which
Supplies the blood vessels & nerves to the living cell of bone
The cells of bone that are living are called?
Osteocytes
Osteocytes are housed
In lacunae & are found between adajacent concentric lamellae
Matrix of bone is
Rigid & is laid down by osteocytes; so the living cells lay down a non-living matrix level/layer which is hard material
If osteocytes were removed, such as when the bone dies, what would happen?
There would be a space or a gap that would remain. This space is called the lacunae.
Bone is laid down in concentric
Rings
Each ring of bone is called?
A lamellae
Lamellae are
Rings of bone connective tissue that surround the central canal & form the bulk of the osteon
Communication from one lamellae (ring) to the next is through what?
Very small canals called canaliculi
Canaliculi are
Tiny, interconnecting channels within the bone connective tissue that extend from each lacuna, travel through the lamellae, & connect to other lacunae & the central canal
The periosteum
A fibrous sheath that surrounds the whole bone & many osteons.
The skeleton is arranged into two subdivisions
The axial skeleton & the appendicular skeleton
The axial skeleton is made up of
The skull, vertebral column, ribs, & sternum
The ribs & sternum together are known as
The thoraces
The thoraces, skull, & vertebral column make up
The axial skeleton
The ends of long bones are called?
Epiphyses
The shaft of a long bone is called?
Diaphysis
A proximal epiphysis is?
The end of a long bone closest to the body trunk
A distal epiphysis is?
The end of a long bone farthest from the trunk of the body
Between the diaphysis and each epiphysis is a thin layer of cartilage called
The epiphyseal line
