Food

 

Food

Why do you eat?

Most of the food you eat is fuel which is burned by your body to get energy to keep you going. To get energy, you need carbohydrates and fats. You also need small amounts of proteins for repairing and building body cells. Tiny traces of vitamins and minerals are also needed.

Where does food go when youeat it?

The food goes down your body through a long tube called the alimentary canal. When you swallow the food, it slides down your gullet or esophagus into the stomach. Here, it churns around for a few hours. Then, if is squeezed into along, cold fube called the small intestine. The nourishing parts of the food are absorbed into the blood here. The rest are passed on into a larger tube called the large intestine. The waste or feces is pushed out through the anus.

How long are your guts?

The guts or intestine are coiled up so much that if you unwound them, they would be over three times as long as your body-6 m.

 

Digestive system

If you could see your digestive dix 5ystem through your body, this is what you would see. Most of the system is the alimentary canal, the long tube that takes food through your body.

How is food broken down?

Food is broken into small molecules by a process called digestion in two ways. First, food is broken up mechanically by chewing and by the squeezing of the muscles of your gut. Second, if is at tacked by acids, such as bile and

hydrochloride acid in your stomach, and by chemicals Called enzymes, mixed in with your saliva and stomach Juices.

 

What are carbohydrates?

Carbohydrates are foods made of sugar like glucose and starch Bread, rice, potatoes and pasta, as well as sweet things, are rich in Carbohydrates.

What are fats?

Fats are greasy foods that do not dissolve in water. Some are solid, like cheese and meat fat while others are oils. Fats are usually stored by the body as energy reserves, rather than burned up at once like Carbohydrates.

 

Which food makes you grow?

To grow, your body needs proteins. They are the substances from which cells ore built. Proteins are made from 20 basic chemicals called amino acids. The body can make 12 of these. The other eight are obtained by eating protein-is food such as milk, fish, meat, eggs and beans.

Inside a tooth

Your teeth must be really hard to chew food every day. The outside of a tooth is made from enamel. It is the hardest substance in your body. Inside that is dentin a material as hard as bone. At the center is a pulpy mass of blood and bones.

A healthy diet

A healthy diet consists of just the right amount of each kind of food your body needs. The bulk of your diet must be solid food like carbohydrates. it must also contain enough fat, plenty of protein, and the correct amount of vitamins and minerals.

Why are teeth different?

Different teeth perform different tasks. The flat 'incisors at the front have sharp edges for slicing through food. The pointed canines just behind the incisors are good for ripping chewy food. The big flat-topped 'premolars and 'molars forwards. The back of your mouth are good for grinding food.

 

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