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23 Cards in this Set

  • Front
  • Back
cells that produce bone
osteoblasts that become surrounded by bone and have changed
Name 4 main functions of Bones
-Support the body
-Protect organs and tissues
-Store minerals, part. calcium
-Blood cell formation
Cancellous Bone
aka spongy bone, spicules (spaces) contain bone marrow
What are the 2 main types of bones
-Cancellous (light/spongy)
-Compact Bone (dense)
Compact bone
-1 of the 2 main types of bone in the body
-heavy, dense, strong
-contains haversion systems
-covered by periosteum
Haversian System
found in compact bone, runs lengthwise in the bone and contains blood and lymph vessels that supply the osteocytes
protective membrane that covers compact bones-has an outer and inner layer-outer contains fibrous tissue-inner contains osteoblasts
membrane that lines the hollow interior surfaces on bones
What are 3 types of cells that make up bones?
osteoblasts, osteocytes, osteoclasts
they eat away bone-removes bone from where it is not needed
Volkmans Canals
tiny channels in the bone matrix-the blood vessels in the canals bring nutrition to the osteocytes in the haversion system
What are the two mechanisms that can create bone?
endochondral bone formation and intramembranous bone formation
Endochondral Bone formation
most bones are formed this way-the body first creates a template of cartilidge which is replaced by bone
Intramembranous Bone Formation
Occurs in certain skull bones-creates the flat bones of the cranium
epiphyseal or growth plates
btwn the diaphysis (shaft) and the epiphyses (ends) of the bone-Site where new bone can lengthens bone for growth
End of the bone
shaft of the bone
What are the 4 bone shapes
Long, short, flat, irregular
Characteristics of long bones
mostly in limbs, consist mostly of cancellous bone covered by thin layer of compact bone, has epiphysis and diaphyses (distal and proximal)
epiphyseal fractures
fracture in the epiphyseal plate that occurs to young bones before they are fully developed and ossified to solid bone.
Characteristics of short bones
shaped like small cubes, have spongy bone covered by compact bone