Biology Digestive system

Digestive system 

• Liver 

The liver is a large organ that sits on the right side of the belly, it weighs 3

pounds, normally you can’t feel the liver, because it’s protected by the rib

cage. The liver has two large sections, the right lobe and the left lobe.

• Small intestine 

. The small intestine or small bowel is an organ in the digestive system where most of the end absorption of nutrients.

• Large intestine 

The large intestine is the last part of the digestive system, water is absorbed

here and the remaining waste materials are stored as faeces (poo) before

being removed by defecation.

• Oesophagus 

Oesophagus connects your mouth to your stomach, when you swallow food

the walls of the oesophagus squeeze together (contract). This moves the food

down the oesophagus to the stomach. When you drink water or anything that is

liquid, it goes through the oesophagus and flows down to your stomach.

• Stomach  

 In the digestive system, the stomach is involved in the second phase of digestion,

In humans and many other animals, the stomach is located between the oesophagus

and small intestine.

• Food entry from the mouth to the stomach and exit from the anus. In between, Ingestion (the first part of the digestive system, entry from the mouth and pass down to the oesophagus, and into the stomach), digestion (food enters the mouth and digestion of the food starts by the action of chewing), Absorption (the movement of digested food through the wall of the intestine into the blood or lymph, the small intestine is where digestive food is absorbed), and at last was the Egestion (is also called defecation, it’s the final act of digestion, defecation is removed the waste material from the digestive tract, that is stored in Large intestine.).