Hi Tim, thank you so much for your valuable feedback. You are so right. I managed to modify the original first image that you mention (which was from BBC and factually wrong, as you pointed out so precisely) and also to exchange the second picture (in the other article), which was also mistaken regarding the intercostal muscles.
I did not quite understand what image you meant in your last comment, however. I reviewed all of the other pictures in both articles and I couldn’t really pinpoint the mistake you mentioned. If you could kindly let me know, I’ll gladly get it sorted it too. :-)
Thanks once again for your help, it’s much appreciated!