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14 Cards in this Set

  • Front
  • Back
bone is a __ tissue so it has a ___ and tis the most ___ and has several functions and is an _____
connective; matrix; rigid; organ
how are they classified?
shape ; what are they (5)
long bones?
have long longitudianl axes and expanded ends; femur
short bones-
cubelike; lengths and widths are roughly equal; carples
flat bones-
platelike structures w broad surfaces ; sapulae
irregular bones-
variety of shape connected to several other bones, facial bones
sesamoid (round) bones-
small and nodular and are embedded within tendons adgacent to joints, where the tendons are compressed; kneecap
about the medulary cavity-
starts as red bone marrow witch actively produced blood cells, as long bone matures it goes into yellow bone marrow whcih stores fat and is inactive in producing blood
about the trabecuale-
bone plates found in epephysis that suppoprt ends of long bones that have alot of pressure
what can you see in a bone with microscope?
osteonic canal, lamellae, lacunae, osteocytes, canaliculi, perroating canals- ensure better blood supply and osteon- (1000s per bone)
converting cartilage (hyaline) or primitive sheets of C.t. into bone and this takes up to 25 yrs
intramembranous ossifaction- what kind of bone
sheets of primitive c.t. appear at sites of future bones; primitive c.t. cells collect around blood vessels in these layers; c.t. cells differentiate into osteoblasts, which deposit spongey bone; osteoblasts become osteocytes when bony matrix completely surrounds them; c.t. on the surface of each developing structure forms a periosteum; osteoblasts on the inside of the periosteum depoist compact bone over the spongy gone (flat bone)
endochondral ossification-
what kind of bone
masses of hyaline cartilage form modles of future bones; cartilage tissue breaks down, periosteum develops; blood vessels and differentiating osteoblasts from the periosteum invade the disintegreating tissue; osteoblasts form spongy bone in the sapce occupied by carilage; osteoblasts become osteocytes when bony matrix completely surrounds them; osteoblasts beneath the periosteum deposit compact bone around spongy bone (long bone)
does growth in lenth stop or diameter?
length only