The cupcake is approximately here, in the stomach.
The cupcake is approximately here, in the small intestine.
The cupcake has nutritional values, for example, lipids for long-term energy stores and insulation. The cupcake is eaten and is broken down by a mixture of teeth chewing, the tongue and saliva from the mouth (mechanical digestion). It is then transported down the oesophagus and into the stomach.
The cupcake is approximately here, in the large intestine.
The cupcake has been broken down by mechanical digestion, travelled down the oesophagus and the cupcake mush has been stored in the stomach, stomach acid starts to form (this has a pH of 2). The stomach acid rids bacteria and breaks down the food even more.
The bacteria-free mush of a cupcake has left the stomach and entered the small intestine. The small intestine secretes digestive enzymes that help in digestion process. It also absorbs the nutrients from the food and gets transferred into the blood stream because of small folds.
After the mush has gone through the small intestine, it enters the large intestine. The large intestine removes any excess water from the mush left remaining. This happens before the substance is ready to be excreted.
The body is very clever and stores all the good food from the small intestine in the liver and it is the liver's job to release the energy into the blood stream. However, it still keeps the bad and useless food until it has to excrete.
After about a day or so, your body will send a signal to your brain signifying that it can't store any more food and as a result of this, have to excrete and produce food waste. This digestion process will repeat and continue unless your body does not take in any more food. This is respiration.