Lucy+Digest.+notes

__Why should we eat__? - to give us energy - the building blocks (matter). we have to consume matter because we are made is matter - we lose our parts of body by breaking down, decaying, shedding

Calories: - energy. It gives you the sense of how much energy you will get - most people don't know how much energy ( calories) they are getting, so the over eat

Fat: - protection - every single cell have fat barrier - fats are some times bad: ones to aviod are saturated fats ( comes from animals, and are solid at room temp) and trans fat is the really bad fat.

Cholesterol - - you don't need to consume it ( limit it) - eat it in moderation - gives you heart disease

Carbohydrates - good carbs ( fiber) Plant materials, not pure sugar,

protein: - everything cells do is done by proteins - made out of: amion acids - when we eat protein its because we can get the amion acids and make our own proteins. We need the building blooks called amion acids - 20 amion acids - humans can only make 10 amio acids - they are called the essential ones - animals, eggs, nuts, milk, wheat, beans, rice, corn - all good sources of proteins

Vitamin A: - important for us - we have to eat it - need it so we dont go blind - carrots are a good source. - vision

Vitamin c- - making a protein called collagen. - about 25 % of human protein. - collagen is in lips and nose, in between cells, a filler protein.

Calcuim: - builds strong bones

Iron - red blood cells that carry oxygen need this

Footnotes: - the recommended facts

Digestion: - Starts at mouth - break the food into smalled peices - the sugar can be broken down in mouth and absorbed in mouth - food then enters into stomach - Acid in stomach, so acid and the muscel in stomch churns food to make it smaller - still not microscopic. - Protein can be digestive in stomach - Then the small intestine is where the digestion starts.- breaking the food down to where is can be absorbed into a cell - small intestine has a surface area of a tennis court. Then the large intestine - the food that wasnt absorbed in the small intestine is now in the large intestine. Friendly bacteria was in the large intestine. Fiber is usually in the large intestine. The bacteria eat the food in the large intestine. The water in the large intestine is absorbed and it becomes more firm. If fluids don't get absorbed you become dehydrated.

Takes about a minute to get into stomach 2 hours in teh stomach in small intestine for the net 4 hours. sits on large intestine - becomes firmer. spends 27 hours in large intestine. total: 33 hours.

- tube is 20 feet ( made of cells)