Costal cartilages - hyaline cartilage connecting the anterior aspect of the bony ribs to the sternum (costal cartilages are shaded red in image below)
a. 1st cartilage fuses with R1 and manubrium-sternochondral joints
b. cartilages 2-10 involved in synovial joints at one end (with sternum or higher rib), fused with rib at other end
c. cartilages 11-12 are pointed and end in muscles of anterior abdominal wall
Examine the shaded costal cartilages and the points above in the image below and then go on to next page.