摘自The digestive system of the pig.HN.Larke & M.S.Hefemann.原文：At birth, the small intestine is about 2 m long and has a capacity of 72 ml. At weaning, it has more than tripled in length (6.5 m) and has a nine-fold higher capacity (650 ml). The small intestine of fully grown pigs is 16-21 m, weighs 2-2.5 kg and has a capacity of >20 l. Based on calculations of length and diameter, it has been calculated that the surface area of the mucosa of a newborn pig is 430 cm2, while in 7-month-old pigs, it is 5.8 m2. Whereas the small intestine accounts for approx.4-5% of the weight of the animal during the suckling period, it decreases to 1.5% when reaching slaughter weight.
译文：出生时，小肠长约2米，容量为72毫升。断奶时，小肠长度增加了3倍多(6.5米)，容量增加了9倍(650毫升)。成年的猪小肠长度为16 ~ 21 m，重2~2.5 kg，容量为20升。通过长度和直径计算，初生猪小肠粘膜表面积为430cm2, 7月龄猪小肠粘膜表面积为5.8m2。哺乳期仔猪小肠大约占体重4-5%，达到屠宰体重时降至1.5%。
