Above is a cross section sliver of a conifer under 20-30 magnification. You can see between two growth increments are two large bubble like structures. They are resin ducts among tracheids.
Above are many resin ducts. I count 9.
Above you see resins coming from resin ducts in sapwood. This pine also forms heartwood to the inside of sapwood.
Above are resins on a three year old wound on a pine.
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