What do you call these 2 groups of ribs?

In the first image, those are fake ribs that are attached to the sternum through  the costal cartilage

in the second image are real ribs since they are directly attached to the sternum

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.