skeletal system

Question 1

endosteum

Answer 1

inner layer before bone
has cells for growth, repair, and remodel

Question 2

periosteum

Answer 2

outer layer of bone

Question 3

osteoblasts

Answer 3

syn bone matrix
mineralization of skeleton
secrete osteiod

Question 4

osteocytes

Answer 4

when osteoblast stuck in lacunae

Question 5

osteoclasts

Answer 5

demineralize bone
free up calcium stored

Question 6

diaphysis

Answer 6

middle tubular shaft of bone

Question 7

epiphysis

Answer 7

end of bone w growth plate

Question 8

bone shapes

Answer 8

long bone - long
short bones - cube like
flat bone - thin and curved
irregular bone - not in any other category
sesamoid bone - usually near muscle or tendon

Question 9

compact bone

Answer 9

dense bone
aka cortical bone
organized w osteons

Question 10

spongy bone

Answer 10

aka cancellous bone
has matrix trabeculae
at epiphysis
contain osteocytes

Question 11

Haversian canal

Answer 11

pathway for blood vessels and nerves in osteons
run vertically through the bone

Question 12

lamellae

Answer 12

rings made of bone deposits

Question 13

lacunae

Answer 13

small opening in lamellae
contain fluid and osteocytes

Question 14

canaliculi

Answer 14

canals radiate fr lacunae

Question 15

Volkmann canals

Answer 15

connect the verticle Haversian canals

Question 16

type of bone formation

Answer 16

flat bones
- intramembranous develop in sheet like layers of connective tissue
tubular bones
- develop fr cartilage plates

Question 17

steps for tubular bone development

Answer 17

formation of periosteum
develop primary and secondary ossification center
develop medullary cavity
form epiphyseal plate and spongy bone

Question 18

types of joints made of

Answer 18

fibrous
cartilaginous
synovial

Question 19

fibrous

Answer 19

held together by dense connective tissue
little to no movement

Question 20

synovial

Answer 20

freely moveable and encapsulated w synovial
contain synovial fluid and cartilage
most joints

Question 21

cartilaginous joints

Answer 21

joints made of cartilage connect bones
small movement

Question 22

types of joint movement

Answer 22

ball and socket - round and round; variety movement

hinge - convex surface and concave socket; move in one plane

condyloid - modified ball and socket; ex wrist

gliding - flattened surfaces; carpal bones of wrist

pivot - semicircle and small circle inside; radius and humerus

saddle - like a saddle; carpal-metacarpal

Question 23

inversion

Answer 23

twist foot towards body

Question 24

eversion

Answer 24

twist foot away from body