Food & Digestion Shopping

Presentation7th Grade Science

•Calorie is a unit of energy.

•The food guide pyramid: how much food we each in each group per DAY. 6 food groups are: grains, veggies, fruits, oils, dairy, protein

•Protein, Fats, Carbohydrates, Water, Minerals, Vitamins are the 6 types of Nutrients

•Carbohydrates: Sugars and starches

•Fiber is a carb that cleans our digestive track but it is not digested by our bodies.

My Food Plate-How much we should eat from eat group per MEAL

• You should eat most from the grains and veggies group. Eat the least from the fats, sweets, and oils groups.

• This is a picture of the VILLI that is found in the SMALL INTESTINE and is responsible for the ABSORPTION of nutrients. Absorption is the process by which nutrient molecules pass through the digestive system. The villi adds surface area to the small intestine.

Villi-small finger like projections in the small intestine

NUTRIENTS, NUTRIENTS!!!

•Protein: made up of amino acids

•Minerals: Iron, magnesium, phosphorus

•Fat: highest energy nutrient

•Water has zero calories

•Digestion is the process by which the body breaks down food for small nutrient molecules.

made of smooth muscle

Makes hydrochloric acid that raises the acid level, makes pepsin to breakdown protein

(Pancreatic juices)

breaks down starches, proteins, fats

from solid waste and extracts water

through the villi

Anus- muscular opening

Chemical Digestion

Happens in the mouth, stomach, and the small intestine

Saliva in the mouth

break down food molecules to make nutrients for the body

Mechanical Digestion

Teeth and tongue start this process.

The churning of the stomach

Functions of the digestive system

• Break down food molecules.• Absorb molecules into the blood and carry them throughout the body.

• Eliminate waste.

• Most digestion takes place in the small intestine. The large intestine absorbs water out of undigested food so it can be eliminated.

• Peristalsis-the muscular action (contractions) that moves food along the digestive track.

• Hydrochloric acid is the chemical produced in the stomach that kills germs and provides an acidic environment for pepsin to work. Pepsin break down proteins in the stomach and mucus lines the stomach to the acid does not break down the stomach wall.