canals becoming porous

knowledge base : exist
structure : inner wall
Stipules : isn't included in the term
Carcass perforations: inner wall (IW) : Canals
Constitution of carcass canal system (IW) : 2 zones
Building of carcass canals (IW) : isn't included in the term
Shape of carcass canals zone A (IW) : isn't included in the term
Porosity of carcass canals zone A (IW) : Non-porous
Relationship between carcass canals zone A and intersept (IW) : isn't included in the term
Direction of carcass canals zone A (IW) : isn't included in the term
Shape of carcass canals zone B (IW) : isn't included in the term
Direction of carcass canals zone B (IW) : isn't included in the term
Porosity of carcass canals zone B (IW) : Porous
Building of carcass perforations (IW) : isn't included in the term
Carcass external plates: inner carcass wall (IW) : isn't included in the term
Type of morphological tubes (IW) : isn't included in the term
Additional sheath : isn't included in the term