Chapter 7.13

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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


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