Chapter 3: The Thorax Flashcards Preview

Human Anatomy > Chapter 3: The Thorax > Flashcards

Flashcards in Chapter 3: The Thorax Deck (443)
Loading flashcards...
1

what is the superior thoracic aperature open to?

open to the neck

2

what is the inferior thoracic aperature closed by?

the diaphragm

3

what are the flexible walls of the thorax formed by?

the musculoskeletal system (ribs, verts, sternum, muscles)

4

L and R pleural cavities surrounding lungs and mediastinum

thoracic cavity

5

*one of the most important functions of the thorax

breathing

6

what parts of the thoracic region are involved in breathing?

diaphragm
thoracic walls
ribs

7

provides major change in thoracic volume

diaphragm

8

changes in lateral and anterior dimensions of thorax during breathing

thoracic walls

9

what does the thorax house?

houses not only lungs, heart, and great vessels but also much of the liver, stomach, and spleen

10

*acts as a conduit for structures that pass through the thoracic cavity or connect to structures in the thoracic cavity

*houses the heart

the mediastinum

11

consists of skeletal and muscle elements

thoracic wall

12

what does the thoracic wall consist of posteriorly?

12 thoracic vertebrae and intervertebral discs

13

what does the thoracic wall consist of laterally?

ribs and intercostal muscles

14

what does the thoracic wall consist of anteriorly?

sternum (manubrium, body of the sternum, xiphoid process)

15

composed of costal cartilage

Anterior (distal) end of ribs

16

what do ribs articulate with?

thoracic vertebrae

17

how many articulations do ribs have with vertebral column?

most have 3

18

are classified as true, false, and floating

ribs

19

Bordered by vertebrae T1, medial margin of 1st rib, and manubrium

superior thoracic aperature

20

what is the plane of the thoracic aperture?

oblique

21

how do the first ribs slope?

inferiorly

22

what lies on either side of the entrance to the mediastinum at the aperture?

superior aspects of the pleural cavities

23

what do structures that pass between the thorax and limb pass over?

the pleural cavity and 1st rib

24

how do structures that pass to the neck go?

pass more vertically

25

what is a central line put in?

subclavian vein?

26

how is the superior thoracic aperture sloped?

Sloped downward so posterior attachment is more superior than the anterior attachment

27

*Large and expandable, closed by the diaphragm
*hole going into the abdomen

inferior thoracic aperture

28

how do structures that pass to the abdomen go?

pierce or pass posteriorly to the diaphragm

29

arise radially from margins and converge into a large central tendon

fibers in the inferior thoracic aperture

30

what are the skeletal elements that form the boundaries of the inferior thoracic aperture?

*Body of vertebrae TXII posteriorly
*Rib XII and distal end of rib XI posteriorly (floating ribs)
*Distal cartilaginous ends of rib VII-X that unite and form anterolateral border