Yes, there are false ribs in the skeleton.
No. Crabs do not have an internal skeleton (endoskeleton). They have only an external skeleton (exoskeleton) that does not have any ribs.
False ribs are ribs that have no direct attachment to the sternum (breast bone).
The Axial skeleton
The correct order of ribs from superior to inferior are true ribs, false ribs, and floating ribs. Humans have 24 ribs.
Humans have 5 false ribs. Ribs 8-12 are considered false ribs because they do not have a piece of costal cartilage that connects them directly to the sternum. Ribs 11 and 12 are also considered floating ribs because they do not have any costal cartilage and don't connect to the sternum at all.
Three types of ribs we have are True ribs, False ribs, and Floating ribs.
Yes, the ribs are part of the axial skeleton.
The Axial Skeleton
Yes, false ribs are still attached to coastal cartilages. Floating ribs aren't.
The order of ribs from superior to inferior is: True ribs (1-7) False ribs (8-10) Floating ribs (11-12)
Spare ribs
Spare ribs