thoracic cage 2-19
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