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anatomy > Thoracic Cavity > Flashcards

Thoracic Cavity Flashcards

1
Q

What is the thorax?

A

region between neck and abdomen housing major organs of respiration and blood circulation

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2
Q

What are the compartments of the thorax?

A

2 pulmonary cavities and a mediastinum

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3
Q

What is the pulmonary cavities?

A

where the lungs, pleura and pleural cavities are

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4
Q

What is the mediastinum?

A

area between pulmonary cavities that contain heart, aorta, trachea, etc

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5
Q

What are serous membranes?

A

doubled layered membranes that create serous fluid and lubricate the cavities and organs; meninges, pleura, pericardium, peritoneum

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6
Q

What is the superior thoracic aperature?

A

aka thoracic inlet - opening of rib cage

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7
Q

What is the inferior thoracic aperature?

A

aka thoracic outlet - bottom opening of the rib cage

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8
Q

How many ribs do you have?

A

24; 12 pairs

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9
Q

What is the costal groove for?

A

to protect the intercostal muscle and vessel; neurovascular bundle

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10
Q

Which are the true ribs?

A

1-7

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11
Q

Which are the false ribs?`

A

8-12

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12
Q

Which are the floating ribs?

A

11-12

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13
Q

Why are they called false ribs?

A

because they do not directly attach to the sternum but rather multiple of them feed into one rib

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14
Q

What are the three parts of the sternum?

A

manubrium, body and xiphoid process

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15
Q

What is the joint where the sternum joins the clavicle?

A

sternoclavicular joint

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16
Q

What are synovial joints?

A

Joints between the sternum and the cartilage of ribs 2-4

17
Q

What are synovial joints?

A

Joints between the sternum and the cartilage of ribs 2-4; contain fluid in the joint space

18
Q

What is a costochondral joint?

A

where the bone of the rib meets the cartilage of the rib

19
Q

What is the transthorasic plane

A

Plane of Ludwig; imaginary line that goes through the sternal angle and t4 and t5, 2nd costal cartilage; crosses many important structures

20
Q

What structures cross the transthoracic plane?

A 
RATPL(LAA)AT
R = Rib 2
A = Aortic arch
T = Trachea bifurcates
P = Pulmonary artery bifurcates 
L = Left recurrent laryngeal nerve 
A = Ligamentum Arteriosum 
A = Azygous vein 
T = Thoracic duct
21
Q

What are suspensory ligaments?

A

ligaments of copper; attaches breast to overlying dermis and keeps breast up

22
Q

What is axillary tail?

A

tail of spence; attaches breast to the armpit area

23
Q

What are external intercostals?

A

rib muscle that runs down and in (inferomedially); from transverse process to mamillary line

24
Q

What are internal intercostals?

A

fibers run superomedially; sternum to scapular line

25
Q

What do external intercostals do?

A

how you do take deep breath in

26
Q

What do internal intercostals do?

A

push air out

27
Q

What are two types of innermost intercostals?

A

subcostals and transversus thoracis

anatomy (12 decks)

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