One of your colleagues astutely noticed last night that Station 21 of the Axial Skeleton Practice Practicum slide show uses a lumbar vertebra to indicate articular facets for the rib head and for the rib tubercle. Of course, only thoracic vertebrae feature those facets. I have sent notice of the error to the creator of the slide show, and I will post a new version when she makes the correction. For now, you should realize that the facets are indicated in the correct POSITIONS, but they should be on a "giraffe head", not on a "moose head".