OK. I had a bit of time to think about it. Here are two things to think about:
1. The categorization of rupa in the post, “Rupa (Material Form) – Table” is at the fundamental level.
– On that level “internal rupa” are in a category by themselves. Those are the pasada rupa responsible for actual sensing.
– Our physical bodies are made of the four great elements (maha bhuta): patavi, apo, tejo, vayo. Those “elements” do not belong to “us”.
2. However, a live person has control over his/her body IN CERTAIN aspects.
– For example, we can use our bodies to moral deeds or immoral deeds.
– Therefore, in Kāyānupassanā, for example, “Iti ajjhattaṃ vā kāye kāyānupassī viharati” refers to one’s physical body. That means stopping it for immoral deeds and to use it for moral deeds.
So, it depends on the context.
– In the absolute categorization, internal rupa would be pasada rupa.
– But in the context of Kāyānupassanā, for example, ajjhatta kāya refers to ones’s own physical body.