BIOLOGI

DIGESTIVE SYSTEM

       Digestive System in Human

The process of digestion in human occurs outside the cells and called extracellular digestion. Human digestive system includes digestive tract (mouth, pharynx, throat, stomach, small intestine, large intestine, and anus) and digestive glands (liver and pancreas).

1.       Mouth

Humans put in the food they eat into the body by swallowing them, which is called ingestion. Mouth is completed with some devices, such as tongue, teeth, and salivary gland.

2.       Pharynx

Pharynx and Throat are the connection tract between mouth and stomach. Pharynx is short portion where food tract and air tract meet.

3.       Oesophagus

Oesophagus is a continous, muscular, and thick walled tube. In oesophagus occurs peristaltic movement.

4.       Stomach

Stomach is located below the body cavity construction or above abdominal cavity. Stomach has some primary functions, such as storing food, mixing food, and preparing the hydrolisis process protein enzymes.

5.       Liver and Pancreas

Liver is the largest digestive gland ; it can weigh almost 2 kg. It’s functions are as a food storage from blood in the form of glycogen, absorbing iron from damage blood, and as a blood storage.

Pancreas functions as exotine gland, endocrine gland, and a producer of enzymes.

6.       Intestine ( small and large) and Anus

Intestine is a tract to digest food, absorb nutrients, and as a site for fermentation and waste decomposition by bacteria. The waste material of digestive process is thrown away through anus (defecation).