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Hub192 > L16 > Flashcards

L16 Flashcards

1
Q

what is contained in the thoracic cavity?

A

mediastinum: heart, vessels, pericardium
pleural cavities

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2
Q

what type of cartilage is costal joints?

A

hyaline cartilage

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3
Q

what are the three joints which connects the sternum to the ribs

A

sternocostal
costochondral
interchondral

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4
Q

what type of joint is sternocostal

A

1st: cartil
synovial

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5
Q

what type of joint is chostochondral

A

cart

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6
Q

what type of joint is interchondral

A

synovial

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7
Q

what are the two articulations between thoracic vertbrae and ribs and what kind of joint are they

A

costotransverse
costovertebral

synovial

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8
Q

what are the two primary muscles needed for respiration?

A

diaphragm and intercostals

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9
Q

what is the diaphragm

A

sheet of skeletal muscle which seperates thorax from abdomen

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10
Q

what is the shape of dia when relaxed and contracted

A

relaxed:dome
contract:flat

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11
Q

explain the action of diaphragm

A

contraction expands thoracic cavity, compresses abdominoplelvic cavity

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12
Q

function of intercostal muscles?

A

lifts and depresses ribcage

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13
Q

what does external intercostals do?

A

lift ribcage

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14
Q

what does internal intercostals do?

A

depress ribcage

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15
Q

what happens during quiet inspiration?

A

diaphragm contracts, flattens
external intercostals contracts, lifts

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16
Q

what happens during quiet expiration? and forced?

A

diaphragm relaxes, domes
external intercostal relax, no longer lifts

forced: internal intercostal contract, depress

17
Q

how are the lungs able to expand as the cavity does?

A

pleura makes lungs stick to thoracic wall

18
Q

what are the 3 pleuras?

A

visceral, parietal, pleural fluid

19
Q

what is visceral pleura?

A

on lungs

20
Q

what is parietal pleura

A

on thoracic wall

21
Q

what is plerual fluid?

A

in between two pleuras for frictionless movement and bonds lungs to thoracic wall

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