Chapter 7.13
Ribs 1-7 gradually increase in ______ and ________ radius.
length; curvature
Costal groove
path of nerves and blood vessles on ribs
The _____ reinforce the posterior and lateral walls of the thoracic cavity
ribs
The _____ and the ______ form the rib cage
ribs; sternum
How many pairs of ribs do we all have?
12 pairs
What does the ribs' tubercle contain that allows attachment to the thoracic vertebrae?
Articular facet that contacts the transverse process of a thoracic vertebrae
Why are the last two ribs called "floating ribs"?
Because they don't connect with the sternum they only connect to the vertebrae and muscles of the body wall
Sternum
Breastbone that forms the anterior midline of thoracic wall
How are the vertebrochondral ribs connected?
Connected by the sternum by costal cartilages
How are the vertebrosternal ribs connected? What's their other name?
Connected by the sternum with costal cartilages; true ribs (1-7)
_______ _______ connect the sternum to the ribs individually or in pairs
Costal cartilages
What are the three regions of the sternum?
Manubrium, Body, Xiphoid process
Thoracic cage - what are its functions?
Protects organs in the chest and provides sites for muscle attachment
Jugular Notch
Superior of the manubrium
Where are the ribs' transverse processes and transverse costal facets in respect to each other?
Transverse process is superior and medial to the transverse costal facet which is lateral
How are the vertebrosternal ribs distinguished from the vertebrochondral ribs?
Vertebrosternal ribs are connected to the sternum by INDIVIDUAL costal cartilages and the vertebrochondral ribs are connected to the sternum by SHARED costal cartilages
Angle of the rib
Where the shaft begins curving toward the sternum
The thoracic cage is the site for muscles that deal with...
breathing; stabilizing vertebral column; moving the pelvic girdle and upper limbs
8-12 ribs are also called
false ribs