Ribs Flashcards
How many pairs of ribs are there?
12
What are true ribs?
Ribs that attach directly to the sternum
What are false ribs?
Ribs attached to the costal cartilage superior than them
What are floating ribs?
Ribs that do not attach to the sternum
What are the true, false and floating ribs?
True: 1 - 7
False: 8 - 10
Floating: 11 - 12
Which ribs are atypical?
Ribs 1, 2, 10, 11 and 12
Why is rib 1 atypical?
Is shorter and wider than the other ribs.
It only has one facet on its head for articulation with its corresponding vertebra (there isn’t a thoracic vertebra above it).
The superior surface is marked by two grooves, which make way for the subclavian vessels.
Why is rib 10 atypical?
It only has one facet – for articulation with its numerically corresponding vertebra.
Why are ribs 11 and 12 atypical?
Ribs 11 and 12 have no neck, and only contain one facet, which is for articulation with their corresponding vertebra.
What type of cartilage can be found between the anterior ends of the ribs and the sternum?
Costal cartilage - bars of hyaline cartilage
What are the two types of costovertebral joints?
- Costovertebral joints
- Costotransverse joints
What type of joints are costovertebral joints?
Synovial plane joints
What provides innervation to the costovertebral joints?
Lateral branches of the posterior rami of C8-T11 spinal nerves
What provides blood supply to costovertebral joints?
Supreme intercostal, posterior intercostal arteries 1-10
What is a costotransverse joint?
The articulations of the necks and tubercles of the ribs with the transverse processes of their corresponding thoracic vertebra
