Figure 1
From: Longitudinal residual strain and stress-strain relationship in rat small intestine
A No-load state. Left: Image of intestinal segments. Mucosal length (Lm), serosal length (Ls). n denotes the no-load state. Right: cross sectional image. Wall thickness (h), circumference (C), inner (mucosal) surface (i), and outer (serosal) surface (o). B Illustration of the way of cutting the tissue and labelling of the strips. Intestinal segments were cut into longitudinal strips and labelled according to their circumferential locations. Strip-m (strip at the mesenteric side), strip-a1 and strip-a2 (strips near the mesenteric side), strip-b1 and strip-b2 (strips near the anti-mesenteric side), strip-c1 and strip-c2 (strips at the anti-mesenteric side). C Longitudinal zero-stress state. Longitudinal strips tend to bend towards serosa. The zero-stress state is denoted by z, and the bending angle by φ D Longitudinal stress-strain experiment in rat small intestine. The illustration of the distension experimental set up on ileal segment. At each pressure of 0, 1, 2, 3 and 4 cmH2O, put weight of 0, 0.25, 05, 0.75, 1, 1.5, 2, and 3 gram on the distal end respectively. Three minutes were awaited to acquire equilibration after applying a combined intraluminal pressure and pulling force. D, L and W denote diameter, length and weight, respectively.