Nutrients…

• Are substances in food that provide energy and materials for cell development, growth, and repair.

Group 1

Classes of Nutrients

CarbohydratesCarbohydratesProteinsProteins  FatsFatsVitaminsVitamins.

ORGANIC(Contain carbon)

Group 1

Classes of NutrientsCarbohydratesCarbohydrates: main source of

energyProteinsProteins: used for growth. Made of

amino acids.  FatsFats: provide energy (stored) and

help body absorb vitaminsVitaminsVitamins: organic nutrients that help

your body to use other nutrients.

Group 1

Classes of Nutrients

MineralsWater

Digestion and Nutrients

Inorganic(no

carbon)

Group 2

Classes of Nutrients MineralsMinerals: Inorganic nutrients that

regulate many chemical reactions in your body.

WaterWater: Most vital factor for survival, other than oxygen. Water enables chemical reactions to take place in your cells.

Group 2

EnzymesEnzymes are molecules that speed up

the rate of chemical reactions

They do this without being changed or used up.

Enzymes also speed up reactions by reducing amount of energy necessary for a chemical change to begin.

Group 3

Digestive Enzymes are:AMYLASE is a starch-degrading

enzyme secreted in the mouth. This enzyme breaks down carbohydrates.

PEPSIN, found in the stomach, causes complex proteins to break down into less complex proteins.

Enzymes are also responsible for MANY chemical reactions in your body---not just the ones involved in digestion!

Group 4

Group 4

Your Digestive SystemMouth: Begins chemical &

mechanical digestion, glands in mouth produce saliva, which contains amylase, which breaks down starch MOUT

H

Group 5

Your Digestive SystemEsophagus: muscular tube that

connects throat to stomach. Moves food down by squeezing (peristalsis)

ESOPHAGUS

Group 5

Your Digestive SystemStomach: muscular bag where

chemical and mechanical digestion continue; food stays here ~4 hours, changes to chyme

STOMACH

Group 5

Your Digestive SystemSmall Intestine: tube nearly 7

meters long where digestive juices from liver and pancreas are added; villi absorb molecules from chyme

Small Intestine

Group 6

Your Digestive SystemPancreas: a small organ that

produces substances that stop the action of stomach acid, makes enzymes that break down carbohydrates

PANCREAS

Group 6

Your Digestive SystemLarge Intestine: absorbs water

from undigested food, where unabsorbed materials become more solid

LARGE INTESTINE

Group 6

Your Digestive SystemLiver: produces bile, which is stored

in gall bladder. Bile breaks up large particles of fats into smaller particles.

LIVER

Group 7

Your Digestive SystemGall Bladder: small sac that stores

bile produced by liver

GALL BLADDER

Group 7

Your Digestive SystemRectum: where muscles control

the release of wastes from the body

RECTUM

Group 7

• Brian Pop - Disgestive System

Brain Pop