How does the digestive system work?
Human The digestive system is a sequence of organs that use mechanical and chemical means to eat, break down, extract nutrients and energy, and throw out waste products in the form of urine and feces. The digestive system has evolved gradually over the hundreds of millions of years and is the only natural way to gain energy for movement and thinking. He is able to manipulate various sources of food, animal and vegetables, but tends to handle food best when cooking. Because cooked food has been so long, humanity, because the species is slightly "spoiled" to his advantage and many people become ill if they consume food that has not received sufficient cooking.
The mouth is entry into the human digestive system. Her teeth lasted and smashed mechanically, while three salivary glands release saliva containing enzyme amylase that chemically crumbles starch and fat. Sliviva facilitates swallowing with moisture, as well as preventing the erosion of tooth enamel by modulating pH.
afterEntering the body in the back of the neck travels down the esophagus, which is not transported not by gravity but with muscular contractions. That's why you can eat upside down. The interior of the esophagus is very moist, which helps further decompose food and prevent damage to the rest of the digestive system.
After the transition through the esophagus part in the digestive system, the food and the drink get to the stomach, where it is further divided into mastery pieces. Since nutrients in food are eventually intended for cell consumption, they must be divided into very small land for delivery. The primary digestion agent is stomach juices that are produced in large quantities and can be very acidic. The secondary agent is muscle contractions within the stomach.
After the stomach, the broken food moves into the small intestine, part of the digestive system, where most of the nutrient extraction takes place. When food moves through thinThe intestine, is mixed with a bile that is produced by the liver, as well as with pancreatic juices that may not surprisingly come from the pancreas. These two liquids further help the digestive process and break down the nutrients in the diet to a point where it can be absorbed by blood. The inner intestine is home to the famous Villi, small live extrucks that collect nutrients on a fine scale.
The final components of the digestive system are the large intestine or the large intestine, the rectum and the urinary tract that separate the liquid mass from the solid mass and send them to the appropriate output ports. Of course, the human digestive system is not 100 % effective, and there are many nutrients left in this "waste" that will be happy to consume bacteria or sent through a waste processing plant.