Signs of Kidney Failure The early indications of failing kidneys include a marked increase in water consumption (polydipsia) and in urination (polyuria); weight loss; apparent decline in appetite; and, in some cases, occasional vomiting. If these signs are observed, the owner should seek veterinary consultation at once.
Function: Chemical digestion of food and absorption of nutrients into your blood. Longest section of your digestive tract. Your small intestine is around five metres long, making it the longest section of your digestive tract. Although it is longer than your large intestine it has a smaller diameter. This is why it's called the small intestine.
The small intestine absorbs nutrients during digestion. The small intestine absorbs small food particles through micro villi (small finger-like tentacles that line the small intestine wall). The nutrients then go to the veins and is carried through the body by blood. <br /><br /> The small intestine is also where most of the substrates bond with enzymes.