I'm reading an article in the July issue of BeeCraft by Eleanor Witter (What we should expect to find in honey, Part 2), saying (in brackets, as an aside to the article):

(A fascinating feature of the proventriculus is that its four lips sieve out pollen, and even some bacteria and spores, allowing filtered nectar to pass through into the ventriculus. That means that the nectar passed from bee to bee during the honey conversion sequence in the hive is already partly filtered.)
I understand the first sentence. The second sentence bothers me as I thought that the nectar that's being passed from bee to bee stays in the honey crop and does not reach the ventriculus. I therefore cannot see how the nectar can be partially filtered as the proventriculus is at the far end of the honey crop - or am I wrong?

Kitta