Written — thorax, ribs, and abdomen

1st to 7th ribs

attach directly to sternum anteriorly through their own costal cartilages

Which ribs are true ribs? describe them

11th - 12th ribs (sometimes 10th rib)

They have basic cartilages that do not even indirectly connect with sternum, instead they end in the posterior abdominal musculature

Which ribs are floating ribs? describe

8th to 10th

have cartilages on their anterior ends that are joined to cartilage of rib superior to it, thus their connection with sternum is indirect

Which ribs are false ribs? describe them

#3-9

Which ribs are considered typical ribs?

Linea Alba

What is the thick line of connective tissue running down the midline of abdomen called?

Inferior Vena Cava

What is the Caval Opening for?

Head of rib

Neck of rib

Tubercle of rib

Body of rib

Typical ribs (3-9) will have the following parts

- lump-like attachment at the junction of the neck and body

- The tubercle has a smooth articular part for articulating with the corresponding transverse process of the vertebra (via a synovial joint) and a rough non-articular part for a fibrous attachment to the tubercle of rib via costotransverse ligament

Describe Tubercle of rib

connects head or rib with body of rib at level of tubercle

Describe neck of rib

- wedge shaped

- has 2 facets that are seperated by crest of head

- one facet articulates with the body of the numerically corresponding vertebra and one facet articulates with that of superior vertebra

Describe head of rib

thin, flat, and curved along its length, most marked at the angle where the rib begins to turn anterolaterally

Inferior edge has a concavity running along its internal surface, the costal groove, which protects intercostal nerve and vessels

Describe body of rib