Question

The last two pairs of ribs are called floating ribs.

1. What do you meant by the term floating ribs? 

2. What are true ribs?

Answer 1

1. Last 2 pairs of ribs are not connected ventrally to the sternum. There ribs are called floating ribs. 

2. First seven pairs of ribs are called true ribs. Dorsally, they pre attached to the thoracic vertebrae and ventrally connected to the sternum with the help of hyaline cartilage.