Stomach
The first chemical change that happens in the body in regards to digestion, the breakdown of foodstuffs, occurs in the stomach. The saliva breakdown would be a physical change.
Foodstuffs does not become feces until it is being acted on in the large intestines. Foodstuffs cannot travel backward because the body has special one-way doors called sphincters that keep one area closed so it cannot have backflow. So, no, feces cannot travel to your mouth.Also, it does not matter if your body digests foodstuffs slowly or fast. Foodstuffs (the mush from food and liquid) will still only go one way--down--during digestion.*If you vomit and see brown fluid with partially digested food, that is bile mixed with gastric juices. It comes from the stomach and is not feces (poop).
in the torso area wherethe intestines arelocated at.
so your body can absorb as much nutrients as it can from the food you eat.
If your asking about primary absorption in digestion and the absorption of nutrients into the body, then primary absorption is the first (primary) place in the body where nutrients are absorbed. In humans this takes place in the small intestines after the food has been broken down in the stomach and passed on to the small intestine.
The primary function of the liver in the human body is to process nutrients from food, detoxify harmful substances, produce bile for digestion, and store essential vitamins and minerals.
The primary function of the digestive system is to supply the cells of the body with nutrition. It does this by ingestion, digestion, and absorption. The waste materials that are not used are then eliminated.
The primary organs associated with digestion are the mouth, stomach, small intestine, and large intestine. These organs work together to break down food, absorb nutrients, and eliminate waste from the body.
Heterotrophs- digestion occurs inside the body. Saprotrophs- digestion occurs outside of body.
The Pancreas helps with digestion and processed sugar in the body.
Humans have teeth to help with the process of chewing and breaking down food. The primary function of teeth in the human body is to aid in digestion by physically breaking down food into smaller pieces that can be easily swallowed and digested.
Primary motor area.