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Anatomy & Physiology > Chapter 6 - Bones > Flashcards

Chapter 6 - Bones Flashcards

1
Q

articular cartilage

A

thin layer of cartilage covering an epiphysis; reduces friction and acts as a shock absorber

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2
Q

articulation

A

where two bone surfaces meet

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3
Q

bone

A

hard, dense connective tissue that forms the structural elements of the skeleton

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4
Q

canaliculi

A

(singular = canaliculus) channels within the bone matrix that house one of an osteocyte’s many cytoplasmic extensions that it uses to communicate and receive nutrients

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5
Q

cartilage

A

semi-rigid connective tissue found on the skeleton in areas where flexibility and smooth surfaces support movement

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6
Q

central canal

A

longitudinal channel in the center of each osteon; contains blood vessels, nerves, and lymphatic vessels; also known as the Haversian canal

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7
Q

closed reduction

A

manual manipulation of a broken bone to set it into its natural position without surgery

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8
Q

compact bone

A

dense osseous tissue that can withstand compressive forces

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9
Q

diaphysis

A

tubular shaft that runs between the proximal and distal ends of a long bone

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10
Q

diplo.

A

layer of spongy bone, that is sandwiched between two the layers of compact bone found in flat bones

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11
Q

endochondral ossification

A

process in which bone forms by replacing hyaline cartilage

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12
Q

endosteum

A

delicate membranous lining of a bone’s medullary cavity

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13
Q

epiphyseal line

A

completely ossified remnant of the epiphyseal plate

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14
Q

epiphyseal plate

A

(also, growth plate) sheet of hyaline cartilage in the metaphysis of an immature bone; replaced by bone tissue as the organ grows in length

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15
Q

epiphysis

A

wide section at each end of a long bone; filled with spongy bone and red marrow

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16
Q

external callus

A

collar of hyaline cartilage and bone that forms around the outside of a fracture

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17
Q

flat bone

A

thin and curved bone; serves as a point of attachment for muscles and protects internal organs

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18
Q

fracture

A

broken bone

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19
Q

fracture hematoma

A

blood clot that forms at the site of a broken bone

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20
Q

hematopoiesis

A

production of blood cells, which occurs in the red marrow of the bones

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21
Q

hole

A

opening or depression in a bone

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22
Q

hypercalcemia

A

condition characterized by abnormally high levels of calcium

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23
Q

hypocalcemia

A

condition characterized by abnormally low levels of calcium

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24
Q

internal callus

A

fibrocartilaginous matrix, in the endosteal region, between the two ends of a broken bone

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25
intramembranous ossification
process by which bone forms directly from mesenchymal tissue
26
irregular bone
bone of complex shape; protects internal organs from compressive forces
27
lacunae
(singular = lacuna) spaces in a bone that house an osteocyte
28
long bone
cylinder-shaped bone that is longer than it is wide; functions as a lever
29
medullary cavity
hollow region of the diaphysis; filled with yellow marrow
30
modeling
process, during bone growth, by which bone is resorbed on one surface of a bone and deposited on another
31
nutrient foramen
small opening in the middle of the external surface of the diaphysis, through which an artery enters the bone to provide nourishment
32
open reduction
surgical exposure of a bone to reset a fracture
33
orthopedist
doctor who specializes in diagnosing and treating musculoskeletal disorders and injuries
34
osseous tissue
bone tissue; a hard, dense connective tissue that forms the structural elements of the skeleton
35
ossification
(also, osteogenesis) bone formation
36
ossification center
cluster of osteoblasts found in the early stages of intramembranous ossification
37
osteoblast
cell responsible for forming new bone
38
osteoclast
cell responsible for resorbing bone
39
osteocyte
primary cell in mature bone; responsible for maintaining the matrix
40
osteogenic cell
undifferentiated cell with high mitotic activity; the only bone cells that divide; they differentiate and develop into osteoblasts
41
osteoid
uncalcified bone matrix secreted by osteoblasts
42
osteon
(also, Haversian system) basic structural unit of compact bone; made of concentric layers of calcified matrix
43
osteoporosis
disease characterized by a decrease in bone mass; occurs when the rate of bone resorption exceeds the rate of bone formation, a common occurrence as the body ages
44
perforating canal
(also, Volkmann’s canal) channel that branches off from the central canal and houses vessels and nerves that extend to the periosteum and endosteum
45
perichondrium
membrane that covers cartilage
46
periosteum
fibrous membrane covering the outer surface of bone and continuous with ligaments
47
primary ossification center
region, deep in the periosteal collar, where bone development starts during endochondral ossification
48
projection
bone markings where part of the surface sticks out above the rest of the surface, where tendons and ligaments attach
49
proliferative zone
region of the epiphyseal plate that makes new chondrocytes to replace those that die at the diaphyseal end of the plate and contributes to longitudinal growth of the epiphyseal plate
50
red marrow
connective tissue in the interior cavity of a bone where hematopoiesis takes place
51
remodeling
process by which osteoclasts resorb old or damaged bone at the same time as and on the same surface where osteoblasts form new bone to replace that which is resorbed
52
reserve zone
region of the epiphyseal plate that anchors the plate to the osseous tissue of the epiphysis
53
secondary ossification center
region of bone development in the epiphyses
54
sesamoid bone
small, round bone embedded in a tendon; protects the tendon from compressive forces
55
short bone
cube-shaped bone that is approximately equal in length, width, and thickness; provides limited motion
56
skeletal system
organ system composed of bones and cartilage that provides for movement, support, and protection
57
spongy bone
(also, cancellous bone) trabeculated osseous tissue that supports shifts in weight distribution
58
trabeculae
(singular = trabecula) spikes or sections of the lattice-like matrix in spongy bone
59
yellow marrow
connective tissue in the interior cavity of a bone where fat is stored
60
zone of calcified matrix
region of the epiphyseal plate closest to the diaphyseal end; functions to connect the epiphyseal plate to the diaphysis
61
zone of maturation and hypertrophy
region of the epiphyseal plate where chondrocytes from the proliferative zone grow and mature and contribute to the longitudinal growth of the epiphyseal plate

Anatomy & Physiology (26 decks)

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