Page 25 - E-book Digestive System

Structure and Function of the Human Digestive System

Food in the body goes through four stages, namely Ingestion (the process of
putting food into the mouth), Digestion (digestion), Absorption (absorption), and
Defecation (expenditure at the time).
Food enters the mouth the digestive process begins. Digestion is the process
of breaking down food into small molecules so that it can be absorbed by the body
through the blood vessels. Furthermore, food molecules from the blood enter the
cell across the cell membrane. Molecules that are not used and needed by the
body will be removed from the body through the excretory system such as sweat
and urine. Undigested food in the form of feces will be excreted through the anus,
this process is called Defecation.

Food Digestive Organs
In the body, the process of processing food into
energy is very dependent on the human digestive
system. This system is quite complex, because the
body will also absorb the results for cell growth and
repair for human survival.The human digestive system
allows us to obtain nutrients and energy from various
types of food or drink. Both are needed in metabolic
processes, repair of cells and body tissues, and support
daily activities, such as moving, breathing, studying,
and working.Digestive organs function to digest food
so that it can be absorbed by the small intestine. food
digestive tract includes the mouth, esophagus, stomach, small intestine, large
intestine, and anus.

1. Mouth
In the mouth, mechanical and chemical
digestion occurs. In the mouth there are teeth,
tongue, salivary glands. Digestion of food is
divided into two types, namely mechanical
digestion and chemical digestion. Mechanical
digestion occurs when chewed food is mixed and
kneaded.

Figure 8. Mouth structure and function

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