Table 1. Laminar and entire wall thickness (mean ± SD in µm) of each segment of the rabbit large intestines.

Layer	Cecum	P1	P2	Fusus coli	Distal colon	Rectum
Mucosa	136.8 ± 23.0	406.2 ± 59.6	307.8 ± 64.4	627.7 ± 129.9	313.3 ± 59.4	279.6 ± 38.8
Lamina muscularis mucosae	7.5 ± 2.4	11.5 ± 6.1	12.3 ± 4.3	20.8 ± 16.2	54.2 ± 9.8	114.6 ± 20.9
Submucosa	33.1 ± 13.5	34.5 ± 17.9	37.1 ± 28.7	41.5 ± 23.0	49.2 ± 12.0	72.3 ± 31.3
Tunica muscularis, inner circular	63.8 ± 18.9	132.1 ± 29.9	255.5 ± 72.4	203.9 ± 52.2	157.2 ± 52.8	350.8 ± 80.7
Tunica muscularis, outer longitudinal	41.9 ± 10.4	117.7 ± 64.2	92.7 ± 28.5	93.7 ± 30.8	45.4 ± 14.2	208.6 ± 38.5
Serosa	16.6 ± 6.7	18.0 ± 7.7	14.9 ± 9.6	9.6 ± 9.5	7.1 ± 4.3	22.4 ± 8.8
Total	299.7 ± 32.8	680.6 ± 117.0	676.7 ± 123.4	996.9 ± 168.0	626.4 ± 115.9	1,048.1 ± 108.4

n=18 for each value. For P1 and P2, n=36, because their values are calculated across the tenial and haustral parts. For the outer longitudinal layer of the tunica muscularis in P1, n=24 and that in P2, n=19, because of the occasional absence of the longitudinal muscles. Note that for the serosa in the rectum, the value is of the adventitia.