Carburetter elbow

This is just a 'matter of interest' question!

I am cleaning up a few bits on my 2.25 petrol engine as I'm refitting it, and have got to the carb elbow.

https://www.lrworkshop.com/parts/ERC2876

I assumed this was just a shaped pipe, but in cleaning the inside, I see it has a couple of tubes inside it. There is a smaller tube along the top of the elbow near the inlet, and a larger diameter tube at the exit. Both have the open ends pointing downstream, but the other ends appear to just go through the wall of the elbow, but are then closed off.

Is this right? Are the other ends supposed to be open and mine have been damaged? What's their purpose? Are they somehow related to emission control? If the engine had an ECU, I'd have assumed they were for inlet air pressure or air flow sensors.

These aren't the inlet from the rocker cover breather pipe - that has a proper (larger) port that just feeds into the main volume of the elbow.

A small pipe used to go from the elbow to the oil filler tube on early series 3 engines, later ones went from the elbow to the rocker cover breather, as part of emission control IIRC.

Yeah, that's the 'proper port' I referred to in the last line of my post. These are tubes inside the elbow that don't appear to go anywhere externally at all.