Digestive System Facts: Parts, Mechanical, and Chemical Digestion
Digestive system facts are pretty cool. The process involved in the chewing, swallowing, breaking down, storing, and distributing the food is really interesting and complicated. The digestive system facts include the parts involved in the digestion and the chemical changes of the food. This means that some parts of the food turn into nutrients, while the remaining parts turn into wastes.
- The digestive system facts include the parts and organs involved in the process.
- The walls of the digestive tract are also part of the digestive system. These walls have four layers: the mucosa, submucosa, muscular, and the serosa. The mucosa secretes enzymes, hormones, and mucus. The submucus is rich in nerves, lymph vessels, glands, and blood vessels. The muscular layer is responsible for the movement of the food. And the serosa serves as the protection of the digestive tract and organs.
- Digestive system facts include two types of digestion: chemical and mechanical. Mechanical digestion is the literal digestion of the food. This begins in the mouth, where the food is physically broken into pieces with the help of the tongue, teeth, and salivary glands. The food is further digested in the stomach with the help of certain enzymes right after it is sent down from the esophagus. The food is broken down in smaller particles.
- Of the digestive system facts, chemical digestion is the most interesting of all. This type of digestion involves the chemical change or alteration that the food undergoes. Chemical digestion involves bile, acids, and enzymes. These chemicals are secreted by the stomach, intestines, liver, pancreas, and gallbladder. This is where the food is broken down into different nutrients like amino acids and sugar.
But the digestive system facts don’t stop here. After digestion, the nutrients from the food get distributed and some get stored in the large intestine. The remainder is excreted through the anus.