A&P 1 Bones and markings
How many pairs of ribs are there?
12
How many thoracic vertebrae are there?
12
How many cervical vertebrae are there?
7
How many pairs of true ribs do we have?
7
What pairs of ribs are considered "true ribs?"
Pairs 1-7
What are "false ribs?"
The 8th, 9th, and 10th pairs—false ribs—do not join the sternum directly but are connected to the 7th rib by cartilage.
What are "true ribs?"
The first seven pairs are attached directly to the sternum by costal cartilages and are called true ribs.
Where do true ribs articulate on the vertebrae?
The true ribs are connected anteriorly to the spinal vertebrae.
Where do true ribs articulate on the sternum?
They are called true ribs because they articulate anteriorly to the sternum.
How many lumbar vertebrae are there?
5
What are "floating ribs?"
Pairs 11 and 12 (the lower ribs) that are not attached directly to the breastbone.
What pairs of ribs are considered "floating ribs?"
Pairs 11-12
What pairs of ribs are considered "false ribs?"
Pairs 8-12