Define cells
Cells are the smallest unit of life.
Most cells are specialized, and have features which give them different functions within an organism. Examples are nerve cell and liver cell.
Define tissues
Tissues are a group of similar cells in the same place with the same function. Examples are muscle tissue and nerve tissue.
Define organs
A group of tissues in the same place with the same function is an organ. Examples are the heart and the liver.
Define organ systems
Two or more organs with the same function is an organ system. Examples are the digestive and the reproductive systems.
Name all the organs within the digestive system
The digestive system consists of the mouth, the salivary glands, the oesophagus, the liver, the gall bladder, the small intestine ( the duodenum and the bile duct), the appendix, the stomach, the pancreas, the large intestine, the rectum and the anus
What is the function of the mouth
Digestion of food starts in the mouth. Teeth break down the food and mix it with the
enzymes in saliva. It also begins the digestion of carbohydrates.
What is the function of the stomach
It begins the digestion of protein and small molecules as alcohol are absorbed here
What is the function of the small intestine?
Digested food is absorbed in the small intestine. This means that it passes through the wall of the small intestine and into the bloodstream. The blood then carries the useful substances around the body to where they are needed.
What is the function of the large intestine?
By the time the contents reach the large intestine, most of the digested food has been absorbed. This just leaves water and the waste material that the body doesn’t need or can’t digest. The large intestine absorbs the water and gets rid of the faeces.
What is the function of the duodenum?
