First, as you see here, the drumstick enters the mouth. You sense the food coming into your mouth, so your saliva glands starts pumping out saliva, before the food even reaches your mouth. As you chew, the saliva mixes with the chicken to create a soft lump of food called bolus, and the amylase it contains begins to break down starches (complex carbohydrates) into sugars, which your body can more easily absorb.
The bolus then travels down a long, skinny tube called the esophagus. The esophagus's muscular walls squeeze the bolus down to the stomach, our next destination.
Once in the stomach, hormones tell the stomach walls to release acid that breaks down the bolus into a liquid called chyme, and also activates an enzymes called Pepsin. Pepsin is a stomach enzyme that serves to digest proteins found in ingested food. The hormones also alert the liver, gallbladder, and pancreas to start creating bile.
From there, the chicken enters the small intestine. The liver sends bile to the gallbladder, which holds it until the chicken arrives. Tiny projections called villi absorb the chicken's molecules and the leftover fiber, water, and dead cells enter the large intestine.
Then, the chicken goes through the large intestine, or the colon. The colon drains out most of the fluid through the intestinal walls. This leaves a soft mass called stool.
The large intestine deposits the chicken in a small pouch where I am held until I leave the body through the anus. And this long journey through the digestive system, which takes about 30-40 hrs, finally ends.