1, feces, urine formation site: pig urine formation site for the kidneys, and then through the ureter in the bladder to save, and finally by the urethra out of the body, while the pig feces formation site for the large intestine, by the anus out of the body. 2, the role of the pig's small intestine: the pig's small intestine is mainly to play a digestive role in the absorption, the surimi in the small intestine, due to bile, pancreatic fluid and a variety of digestive enzymes, chemical effects and mechanical effects of small intestine contraction movement. After entering the small intestine, due to bile, pancreatic fluid and various digestive enzymes and the mechanical action of the small intestine contraction movement, the nutrients in the food into a small molecule that can be dissolved in water, and absorbed by the small intestine.

First, the pig's small intestine is loaded with urine or feces

1, the formation of feces and urine site

The pig's urine is formed in the kidney site, and then through the ureter into the bladder for preservation, and finally discharged through the urethra, and the pig's feces in the formation of the large intestine, and finally discharged through the anus.

2, pig small intestine basic introduction

(1) pig small intestine is the most important part of the digestive system in the digestion, most of the food in the small intestine, due to the small intestine contraction movement of the mechanical action as well as bile, pancreatic juice and a variety of digestive enzymes (mainly intestinal peptidases, intestinal lipase, maltase, sucrase, lactase, nuclease, nucleotidase, etc.) of the chemical action, which contains a variety of nutrients into a solvent, which can be used for the digestion of food. The various nutrients contained therein are turned into small molecules that can be dissolved in water and absorbed by the small intestine.

(2) The pig's small intestine mainly includes the duodenum, jejunum and ileum.

Second, how to distinguish between the pig large intestine and pig small intestine

1, size

The pig large intestine than the pig small intestine to be larger, such as cecum and colon in the large intestine, along the longitudinal axis of the intestines, there are thickened by the longitudinal muscle of the intestinal wall formed by the formation of the colonic band, and some of them have colonic pouches, located in the vicinity of the colonic band, the formation of the intestinal fat pendant of unequal size.

2, incision

When buying pig intestines, you can judge by observing the incision of pig intestines, in general, the intestinal wall of the pig large intestine is thicker than the pig small intestine.

3. Length

Small pig intestines are more slender compared to large pig intestines.

4. Specific data

(1) For a pig weighing 1kg, the small intestine weighs 40g, has a volume of 0.1L and a length of 3.8cm, while the large intestine weighs 10g, has a volume of 0.04L and a length of 0.8cm.

(2) For a pig weighing 32kg, the small intestine weighs 1180g, has a volume of 10.7L and a length of 18 cm, while the large intestine weighs 714 g, has a volume of 6.6 L, and a length of 4.3 cm.

(3) In a pig weighing 103 kg, the small intestine weighs 1530 g, has a volume of 14.1 L, and a length of 18.8 cm, while the large intestine weighs 1280 g, has a volume of 10.1 L, and a length of 5 cm.

(4) A pig weighing 270 kg In a pig with a weight of 270kg, the small intestine weighs 1998g, has a volume of 22.6L, and a length of 22.9cm, while the large intestine weighs 2790g, has a volume of 25.6L, and a length of 7.5cm.