Descripteur : Direction of carcass canals tubes zone B (IW)
Type du descripteur : categorical
NB: Convention: Tube begins on intervallum side.
Zone B: Cavity central side.
Canal: Pore modified by skeletal structure thikening or by lintels streching. Canal length is greater than perforation diameter.
Lintel: Skeletal structure separating and bounding adjacent pores/canals.
Carcass: Part of wall on intervallum side.
IW: Inner wall.
- Upwardly opening
-
Upwardly opening: Opening on intervallum side is lower down than the other one.
- Horizontal to upwardly opening AND Lateral opening
-
Some canals tubes have a horizontal opening, others have a upwardly opening and each may be laterrally opened.
Horizontal opening: Opening on intervallum side is as high as the other one.
Upwardly opening: Opening on intervallum side is lower down than the other one.
Lateral
- Horizontal to upwardly opening
-
Some canals tubes have a horizontal opening, others have a upwardly opening.
Horizontal opening: Opening on intervallum side is as high as the other one.
Upwardly opening: Opening on intervallum side is lower down than the other one.
Hiérarchie
Constitution of carcass canal system (IW) | |_ Direction of carcass canals tubes zone B (IW)