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23 Cards in this Set

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Four classifications of bones
long, short, flat and irregular
hematopoiesis
process of blood cell formation
long bones
longer than they are wide, with distinctive ends. Examples are humerous (upper arm), radius and ulna (lower arm), thigh (femur), lower leg (tibia, fibula) and the fingers and the toes (phalanges).
short bones
long as they are wide, box-like structure. wrist (carpals), ankle (tarsals).
flat bones
broad and thin, having flat and somewhat curved surface. breastbone (sternum), ribs, shoulder blade (scapula), and pelvis.
irregular bones
various sizes and shapes and clustered in groups. spinal cord (vertebrae) and face. Seamoid bones are a type.
sesamoid bones
unique, irregular bones enbeeded in the tendons and located around a joint like the kneecap.
diaphysis
main shaft-like portion of the long bone.
epiphysis
located at each end of the long bone where muscle attaches
epiphyseal line
Layer of cartiliage that seperates the diaphysis and epiphysis of the bone. In children it can been seen until they grow and it disappears.
periosteum
thick, white fibrous membrane that covers the surface of the long bone
articular cartilage
thin layer of cartilage that covers the end of the long bones
compact bone
hard, outer shell of the bone.
medullary cavity
inside bone that contains the yellow marrow in compact bone
haversian
small canals in compact bone that contain blood vessels, vessels and nerves. These vessels transport nutrients and oxygen to the bone cells
Cancellous bone or spongy bone/trabeculae bone
not as dense as compact bone. needlikelike bony spiclules that give the bone it's spongy appearance
red bone marrow
blood cell porduction occurs and is eventually replaces with yellow marrow.
yellow marrow
stores fat and is not an active site for blood cell production in an adult
osteoblasts
immature bone cells
ossification
the conversion of fibrous connective tissue and cartilage into bone or a bony substance
osteoclasts
large cells that digest or absorb bony tissue, They help hollow out the central part of the bone by eating away at it.
resorption
the process of removing the old bone tissue or destroying it so that its components can be absorbed into the circulation
osteocytes
mature bone cells that replace the osteoblasts. They are living cells that continue to maintain the bone without producing new bone tissue