Bony Thorax Flashcards
How many pairs of ribs in the bony thorax?
12 pairs
What forms the bony thorax?
12 pairs of ribs, 12 thoracic vertebrae, and the sternum
Length of the sternum
6 inches
Three parts of the sternum
Manubrium, body, xiphoid process
Where does the sternum support the clavicles?
Superior manubrial angles
How many pairs of ribs connect to the sternum?
7
What does the jugular notch align with posteriorly in the upright position?
T2-T3
What lies posterior to the xiphoid process?
T10
Which ribs are considered the true ribs?
The first seven ribs
Which are false ribs and why?
8 to 12 because they do not attach directly to the sternum
What are the spaces between the ribs called?
Intercostal spaces
Which are the floating ribs and why?
Last 2 ribs because they only connect to the vertebrae
Where does the costal cartilage of ribs 8-10 connect to?
The costal cartilage of the 7th rib
What joints are the only points of articulation between the upper limbs at the trunk?
Sternoclavicular joints
Which ribs articulate with only 1 vertebral body?
First, tenth, eleventh, twelfth
How does respiratory movement change obliquity of ribs?
Degree of obliquity decreases with inspiration, and increases with expiration
Shape of ribs anterior vs posterior
Posterior ribs arch up like rainbow , anterior ribs arch down like happy face
SID for sternum
40 in
Centering for RAO sternum
T7, 1 in to upside