there isn’t really much the Cary could have done differently here: the necessary specimens (i.e. multiple near-complete associated individuals of unambiguous taxonomic identity). You’ve left us hanging here with the clarification of your colon! Mind you, figure 7A is about the least convincing...
Semi-thin sections (2 μm) were cut in the longitudinal plane (embryo) and the transverse plane (endosperm) of the kernels, using a Leica Ultrathin Microtome EM UC7 (Leica, Wetzlar, Germany). Samples were stained with 1% methyl violet and observed and photographed under a BX53 light ...
It's made up of these parts: Cecum, the uppermost section Ascending (right) colon, which connects to the appendix Transverse (across) colon Descending (left) colon Sigmoid colon, the S-shaped section that connects to the rectum Peristalsis pushes waste left over from the digestion process throu...