thoracic cage 2-19

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list the names and quantity of the structures that form the bony thorax:

1 sternum 12 ribs 12 thoracic vertebrae

what pairs of ribs are referred to as "floating" ribs?

11-12

how many parts compose the sternum?

3

the usual points of articulation between the ribs and the thoracic vertebra are the: 1: body and spinous process 2: lamina and pedicle 3: transverse process and the body

3 only

what is the approximate length of the sternum for the average adult:

6 inches

what pairs of ribs are classified as false ribs?

8-12

to which location of the thoracic column does the xiphoid process correspond?

T10

where is the sternal angle located?

at the junction of the manubrium and sternal body

what is the name for the middle part of the sternum?

body

which part of the sternum is the elongated central portion?

body

which of the following articulates with the articular facets located just lateral to the jugular notch?

clavicles

which articulation involves the tubercle of a rib?

costotransverse

which articulation is formed in part with the head of a rib?

costovertebral

the posterior rib articulation with the body of a thoracic vertebra is called a/an:

costovertebral joint

with which structures do heads of ribs articulate?

demi-facets of thoracic vertebrae

true or false: ribs increase in thickness the closer they are to the lumbar column

false

which classification refers to the 8th-12th pairs of ribs?

false ribs

which bone classification is the sternum?

flat

which classification refers to ribs that have no anterior attachments

floating ribs

what structures form costovertebral joints?

heads of ribs with thoracic vertebral bodies

what determines whether a particular rib is a true rib or a false rib?

its anterior articulations

what is the name of the notch found on the superior border of the sternum?

jugular notch

with which part of the sternum does the first pair of ribs articulate?

lateral border of the manubrium

what is the name for the most superior part of the sternum?

manubrium

which part of the sternum supports the sternal ends of the clavicals?

manubrium

the junction of which structures creates the sternal angle?

manubrium and sternal body

name the parts of the sternum:

manubrium, body and xiphoid process

which three bony parts compose the sternum?

manubrium, body and xiphoid process

the last two pairs of ribs are calssified as floating ribs because they have:

no sternal attachment

the sternal or manubrial notch is often employed for the localization of the:

second thoracic vertebra

the body ridge formed by the junction of the two upper portions of the sternum is called the:

sternal angle

in the normal adult, the ribs are subdivided into three types based upon their:

sternal attachments

what is the formal name for the breast bone?

sternum

what is the proper name for the structure commonly called the breastbone?

sternum

where on the sternum is the jugular notch located?

superior border of the manubrium

the sternum has a small, pointed process (xiphoid) on its inferior surface. this is a useful landmark in the location of the level of the:

tenth thoracic vertebra

the jugular notch is found anterior to which precise location of the thoracic vertebral column?

the disk space between T2-T3

to which location of the thoracic column does the sternal angle correspond?

the disk space between T4-T5

what pairs of ribs are classified as true ribs?

the first 7

which pairs of ribs are classified as true ribs?

the first 7 pairs

which pairs of ribs attach their costal cartilage to the lateral borders of the sternum?

the first seven pairs

what part of the sternum articulates with the anterior ends of the first pair of ribs to form the first sternocostal joints?

the manubrium

which part of the sternum is most superior?

the manubrium

all of the following comprise the bony thorax except for:

the scapulae

what is the smallest part of the sternum?

the xiphoid process

which part of the sternum is located at the level of T10?

the xiphoid process

what is the purpose of the bony thorax?

to protect the heart and lungs

with which structures do costal tubercles articulate?

transverse processes and thoracic vertebrae

true or false: the anterior end of a rib generally is located 3-5 inches below the level of its head

true

the first seven pairs of ribs are classified as:

true ribs

which classification refers to ribs that attach their costal cartilages directly to the sternum?

true ribs

how many pairs of ribs are classified as floating ribs?

two

what is the distal part of the sternum?

xiphoid process


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