They do overlap extensively and that anatomical rendering is very accurate, although it doesn't show all of the short ribs.

Below is a photo of the rib cage of a buff I shot in Tanzania, in the Selous, taken one day after we left the torso on a river bank for lion bait.

As you see, the ribs have spread open a bit. They were picked clean by hyenas, vultures, marabou storks, etc., but you can still see the structure.

No lion touched it by the way.