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