DIgestion+Notes


 * Notes on Digestion**

We need to ear because of; Energy and Matter. Building blocks, since you consist of atoms (matter) you have to consume atoms (matter) since we are loosing them constantly. Cells are dying all the time and you need to have the buildign blocks to build these cells to replace them.

Fat is needed by the body as insulation, and it stores long term energy as well. Every single cell in your body has a fat barrier around it, so the consumption of fat is very necessary. Ther are good fats and there are bad fats. Avoid saturated fats that come from animals and are solid at room temperature. Trans fat is a man made fat and is really bad for you, its worse than saturated fat. You should have 3 grams of saturated fat a doay, no more and no less in order to stay healthy. 5% a serving is low and 20% is high. Too much dietary fat causes hart disease, lasck of dietary fat causes colon cancer. Pure sugar is bad in any form and plant fiber is good.

Protein is what helps the cells achieve energy. Our DNA is codes of proteins, thats information that is passed from generation to generation. Very important. They are made out of amiono acieds, and considered to be the building blocks for protein. When we eat amino acids to get building blocks. OUr DNA provides the instructions, and we want to make our own but we need the building blocks to do it. 20 different amino acids, and as humans we are only able to make 10 of them. The other 10 we have to eat and they are called the essential amino acids. This is something that you have to have in your diet. Good foods that have lots of proteins are animals is good. Chicken and Fish have lot of protein is their muscles. Vegans have to eat a lot of rice and beans. A combination of rice and vegitables to get of what non vegitarians can get out of eating meat.

Nutriants, Vitamin A are the the nutriants that are not an energy source but they are important molecules in human bodies. If you don't get enough Vitamin A you can go bline. Its a molecule that involves vision, carrots are a strong source of Vitamin A. Vitamin C is involved in making a protein called cologin. Its around 25% of human protein that is located in your body. Its a filler, located in your lips and nose, fills up the empty spaces in your body. Calcium helps you get stronger bones. Iron helps you not to get bruises

Digestive System- Begins in the mouth, and its a 20 foot long tube that connects to your rectum. ITs like a tunnel that runs through you, lined with cells that try to digest the food and absorb it. THe mouth grinds up the food and makes them into smaller pieces. THe food then goes straight to the stomach and hits all the acids that begin to absorb it, more mechanical digestion. It churns the food and makes it all sloshy and it can't be absotbed by all the cells. One molecule can be chemical digested in your stomach, and tahts protein. The food then hits the small intestine and is where it is broken down even more. Crossing of a cell occurs right here. It has so many folds that if you flatten out your small intesting it has the surface of a tennis court. Longer than the large intestine, and the large intesting is where the food that was not absorbed, something that you don't want. Friendly bacteria eat that food. Fiber is the biggert component that we can't digest but the friendly bacteria can so they just live there for the free food. As the food just sits there, water is absorbed from the stomach. Start to finish takes about 33 hours.