Integumentary System & Ossesus Tissue (LAB 4) Flashcards

1
Q

identify the layers

A
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2
Q
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3
Q
A

thick skin

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4
Q
A

thin skin

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5
Q
A

thick skin

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6
Q
A

meissner’s corpuscle

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7
Q
A

pacinian corpuscle

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8
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9
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10
Q
A

eccrine sweat gland

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11
Q
A

apocrine gland
→ more lumen than eccrine gland

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12
Q
A

sebaceous gland

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13
Q
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14
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15
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16
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19
Q
A

long bone

→ longer than they are wide

→ limb bones

20
Q
A

short bone

→ cube-shaped bones (wrists & ankles)

sesamoid bones form within tendons (ex: patella)

21
Q
A

flat bones

thin, flat, slightly curved

→ sternum, scapulae, ribs, most skull bones

22
Q
A

irregular bones

complicated shapes

→ vertebrae & coxal (hip) bones

23
Q
A

compact bone→ dense outer layer on every bone that looks smooth & solid (osteon is building block)

spongy bone (diploe) → made up of honeycomb-like flat bone pieces called trabeculae

24
Q

structure of short, irregular, and flat bones

A

→ has spongy & compact bone

periosteum covers outside of compact bone while endosteum covers inside of compact bone

bone marrow is scattered throughout spongy bone, no defined marrow cavity

hyaline cartilage covers area of bone that is part of movable joint

25
Q

structure of typical long bone

A

shaft→ diaphysis

bone ends→ epiphysis

articular cartilage covers articular joint surfaces

epiphyseal line is b/w epiphysis and diaphysis

→ used to be epiphyseal plate when one is a child

26
Q
A

periosteum→ white, double-layered membrane that covers external surfaces, except joint surfaces

endosteum→ delicate connective tissue membrane covering internal bone surface and trabeculae of spongy bone

27
Q
A

central (haversian) canal→ runs through core of osteon

perforating (volkmann’s) canals→ occur at right angles to central canals

28
Q
A

lacunae→ small cavities that have osteocytes

canaliculi→ little canals

function: allows communication b/w all osteocytes of osteon and permit nutrients and wastes to be relayed b/w cells

when matrix hardens and cells are trapped, canaliculi forms

lamella→ (interstitial and circumferential) reinforces strength of bone, withstands torsion stresses

→ collagen fibers in a lamella run in single direction while next lamella run in different direction

29
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30
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31
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32
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osteoblasts→ makes bones and secretes unmineralized bone matrix called osteoid

33
Q
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osteocytes→ mature bone cells in lacunae that no longer divide, maintains bone matrix and acts as stress or strain sensors

34
Q
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osteoclasts→ giant, multinucleate cells function in bone resorption (breakdown of bone)

35
Q
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36
Q
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