Final answer:
Peristalsis is the involuntary, wave-like muscle contractions that push food through the GI tract. It typically returns a few days after surgery, marking an important milestone in the patient's recovery.
Step-by-step explanation:
Peristalsis is the rapid, involuntary, wave-like contractions of smooth muscles that push food through the gastrointestinal tract (GI tract) and urine through the urinary tract. This movement is essential for the digestion and processing of food.
After surgery, the return of peristalsis is a significant indicator of recovery in the digestive system. It should typically return within a few days post-operation, but this can vary depending on the type of surgery and individual patient factors. The return of peristalsis is important as it indicates that the GI tract is beginning to function normally again.
In summary, peristalsis allows for the movement of food through the digestive system by a series of muscle contractions and relaxations, and its return after surgery is an important aspect of the recovery process.