Nutrition is the process in which an organism obtains there materials from the environment. Nutrition has to do with the human digestive system because in order for you to get nutrition you have to be able to digest it, to get it across the cell membrane to distributed threw out your body.

There are two types of digestion mechanical and chemical. Mechanical digestion is the breakdown of without altering the chemical composition . In order to digest a material the food has to go through many organs .The order in which it goes is the mouth ( oral cavity), pharynx (throat), esophagus, stomach, small intestines, large intestines, rectum , and the anus. The mouth and pharynx is wh

a) one secretes a mucus material that covers the lining and protects it from being eroded by the acids.

The small intestine is a coiled tube 6.5 meter long. Most of the chemical digestion and almost all of the absorption occurs here. The fluids are mostly alkaline. The small intestine contains enzymes necessary to complete digestion. Peristalsis of small intestine is in constant motion when food is present the movements are:

When the stomach is done with digesting the food it goes to the small intestine.

The stomach is a thick walled muscular sac., and can expand up to 2 litters of food and water. Both mechanical and chemical digestion occurs here. The stomach contains two types of glands:

Bile breaks down fats into tiny droplets.

Some topics in this essay:
Nutrition Nutrition, salivary glands, digestive system, chemical digestion, digestion occurs, intestine intestine, mechanical chemical,