Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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)
|
|
|
ossification-
|
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
|
