Thorax Flashcards

1
Q

what is the shape of the thoracic cavity?

A

cone that is narrow superiorly and increasing inferiorly with a thin wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the thoracic cage supported by?

A

sternum + thoracic vertebrae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are the 3 divisions of the thoracic cavity?

A
  1. mediastinum: houses thoracic viscera
  2. right pulmonary cavity
  3. left pulmonary cavity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Fx’s of the thoracic wall

A
  1. prtect organs
  2. resist pressure from respiration
  3. provide attachment + support for upper limbs, muscles, abdomen, neck
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

the thoracic skeleton consists of?

A
  1. 12 pairs of ribs + cartilages
  2. 12 thoracic vertebrae
  3. IV discs
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

features of ribs

A

lightweight, resilient, inner bone marrow is spongy (hempoietic) and forms blood cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what are true ribs?

A

vertebrosternal, attach to sternum with own costal cartilages (ribs 1-7)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are false ribs?

A

vertebrochondral, cartilages connected to rib above (ribs 8-10)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what are floating ribs?

A

vertebral, cartilage ends in abdominal musculature (ribs 10-12)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the 4 typical ribs parts?

A

Head: 2 crests to attach to superior vertebrae and one for corresponding vertebrae
Neck: connect head with body
Tubercle: found at junction of body and neck
Body: thin, flat, protects nerves and vessels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

which ribs are the atypical ribs?

A

rib 1: broadest, shortest, facet on head for articulation with T1

rib 2: rough area on upper surface is tuberosity for serratus anterior

ribs 10-12: facet articulating with single vertebra

ribs 11-12: short with no neck or tubercle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the fx of costal cartilage?

A

prolong ribs, give elasticity to thoracic wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the fx of intercostal spaces?

A

separate ribs + costal cartilages

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what are thoracic vertebrae?

A

bilateral costal facets with inferior + superior pairs that articulate with head of ribs

have demifacets (T2-T9)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what do costal facets articulate with?

A

tubercle of rib

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are spinous processes?

A

long slanting process that prevents sharp objects from entering vertebral canal to injure spinal cord

they overlap lower vertebra

17
Q

what limits movement btwn vertebra?

A

rib cage

18
Q

what does the sternum protect?

A

mediastinal viscera + heart

19
Q

what are the 3 parts of the sternum

A
  1. menubrium
  2. body
  3. xiphoid process
20
Q

what happens to the sternum with age?

A

synchondroses: cartilaginous joints ossify in adulthood

21
Q

what are the characteristics of the menubrium?

A

Jugular notch: concave center which is easily palpated
Clavicular notch create sternoclavicular joints
Synchondrosis of 1st rib
Manubrialsternal angle: different angle connecting manubrium to sternum

22
Q

what are the characteristics of the body of sternum?

A

Costal notches creates joints for ribs

Transverse ridges: lines of fusion of sternums 4 original separate sternebrae

23
Q

what are the characteristics of the xiphoid process?

A

Cartilaginous in young, ossified in adults over 40

24
Q

what binds the superior aperture of thorax?

A

posterior: T1
lateral: 1st ribs + their costal cartilages
anterior: superior border of manubrium

25
Q

what binds the inferior aperture of thorax?

A

posterior: T12
posterolateral: 11-12th ribs
anterolateral: 7-10th ribs costal cartilage
anterior: xiphisternal joint

26
Q

what separates the inferior aperture from the abdomen?

A

the diaphragm