Thorax Anatomy
floating ribs
11th & 12th rib, vertebral ribs
The manubrium serves as point of attachement for the costal cartilage for the first ___ pairs of ribs:
2
fused rib
2 adjacent ribs may be joined
The last 2 types of ribs are classified as floating ribs why?
No sternal attachment
cervical ribs
an extra rib may be present on one or both sides above the first rib
sternal angle
angle of Louis or Ludwig, marked by a prominent transverse ridge at the junction of the manubrium and body of the sternum
Chondro
cartilage
what is special about the 8th, 9th, 10th ribs
connection with sternum is indirect by the 7th costal cartilage. Called vertebrochondral ribs.
another name for ribs
costa
A small groove located on underside of rib, serving for canal of veins, arteries...
costal groove
The posterior rib art. w/ the body of the thoracic vertebrae is called:
costovertebral joint
another name for xiphoid process
ensiform
body of sternum
extends from manubrium to xiphoid process, largest part
the costal cartilage of the 10th rib does not joining the sternum and we call it a floating rib:
false
what type of bone is the sternum?
flat bone
sternocostal or costosternal joints (true ribs form this jt)
formed by the sternal end of a costal cartilage articulating with a costal notch on the lateral margin of the sternum
costovertebral joints
head of the rib articulating with the body of the T-spine to form the...
xiphisternal or xiphosternal joint
inferior end of the body of the sternum articulating with the xiphoid process of the sternum
manubriosternal joint
inferior margin of the manubrium articulating with the upper margin of the body of the sternum, at the sternal angle to form...
Costal arch
is the curve formed by the anterior margins of the 7th, 8th, 9th and 10th costal cartilages on each side and rounded tip of xiphoid process
interchondral joints
located between adjacent anterior margins of the 7th, 8th, 9th and 10th costal cartilages and the rib cartilage above each one
Another name for jugular notch is:
manubrium notch, suprasternal notch
3 parts of the sternum
manubrium, body, xiphoid process
absence of ribs
one or more ribs may be absent
Costo
rib
lumbar ribs
short extra ribs may be present below the 12th ribs
The transverse ridge is:
sternal angle and point of fusion for manubrium and body
Describe the structures involved in making the SC joint, be specific:
sternal end of clavicle articulating with clavicular notch of manubrium
jugular notch was formerly called
suprasternal notch
where do the floating ribs end
the anterior ends of their costal cartilages end in the abdominal muscles laterally
forked rib
the anterior or sternal end of a rib may divide into 2 parts
false ribs
the lower five pairs do not articulate with the sternum.
costochondral joint
the sternal end of a rib articulating with costal cartilage
pectus excavatum
the sternum may be depressed so that it lies closer to the thoracic vertebrae than usual
true ribs
the upper seven pairs articulate by means of costal cartilages with the sternum and join with the vertebrae behind they are named vertebrosternal ribs
Which of the following is true about costovertebral joints:
there are 2 types
bones of the thorax
thoracic vertebrae, sternum, ribs (costae), costal cartilages
The usual points of articulations between the ribs and thoracic vertebrae are who:
transverse process and body
Interchondral joints are not seen in the true ribs above the level of the 6th:
true
The costal cart. Of 9th joins the costal cart of the 8th before fusing with sternum:
true
costotransverse joint
tubercle of the rib articulating with the transverse process of T-spine to form...
manubrium
upper part of sternum, separated from the body of the sternum by cartilage (which fuse later in life)
where does the sternum lie?
vertically in the midline of the anterior chest wall
Another name for sternum
breast bone, gladiolus