a process of digestion

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A PROCESS OF DIGESTION The digestive process is important in maintaining the lives of living organisms and in providing them with needed energy. Groups of organs, such as the mouth, esophagus, stomach, and intestines, work together to perform this complex task. Digestion is the process of breaking down food from large molecules into small ones to make it easier for absorption. The three major steps involved in the digestive process are ingestion, digestion, and absorption. Ingestion, which occurs in the mouth, is the first step of the digestive process. After food enters the mouth, the teeth chew it. Saliva, which is produced by the salivary glands, plays a major role in breaking down the food into smaller pieces. These small pieces travel to the stomach through the esophagus. In the stomach, the second step of the digestive process begins. When the chewed food reaches the bottom of the esophagus, a valve lets the food enter the stomach. Contraction of the stomach wall mixes the food. Acidic gastric juices, which are secreted by the gastric glands in the stomach, help in mixing the food and in turning it into a partial liquid so it will have the ability to move into the small intestine. In the small intestine, enzymes are secreted, and digestion is completed.

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Page 1: A Process of Digestion

A PROCESS OF DIGESTION

The digestive process is important in maintaining the lives of living organisms

and in providing them with needed energy. Groups of organs, such as the mouth,

esophagus, stomach, and intestines, work together to perform this complex task.

Digestion is the process of breaking down food from large molecules into small ones to

make it easier for absorption. The three major steps involved in the digestive process

are ingestion, digestion, and absorption.

Ingestion, which occurs in the mouth, is the first step of the digestive process.

After food enters the mouth, the teeth chew it. Saliva, which is produced by the salivary

glands, plays a major role in breaking down the food into smaller pieces. These small

pieces travel to the stomach through the esophagus.

In the stomach, the second step of the digestive process begins. When the

chewed food reaches the bottom of the esophagus, a valve lets the food enter the

stomach. Contraction of the stomach wall mixes the food. Acidic gastric juices, which

are secreted by the gastric glands in the stomach, help in mixing the food and in turning

it into a partial liquid so it will have the ability to move into the small intestine. In the

small intestine, enzymes are secreted, and digestion is completed.

  The last step in the digestive process is absorption. Absorption takes place in

the small intestine. The wall of the small intestine is lined with small, finger like

projections called villi. Small molecules of food are absorbed by the huge number of villi.

Some of these absorbed molecules enter the bloodstream to be distributed throughout

the whole body.

Page 2: A Process of Digestion

  In conclusion, the digestive process involves three major steps: ingestion,

digestion, and absorption. Ingestion, which occurs in the mouth, helps to increase the

surface are of the food particles and prepares them for digestion. In the stomach,

digestion begins, and it continues until it reaches the small intestine, where absorption

takes place. The digestive process maintains organisms' lives by providing them with

energy needed for different functions.

NUM. PARAGRAPH STRUCTURE SENTENCES

1 THESIS STATEMENT The three major steps involved in the

digestive process are ingestion, digestion, and

absorption.

2 TOPIC SENTENCE 1- The digestive process is important in

maintaining the lives of living

organisms and in providing them with

needed energy.

2- Ingestion, which occurs in the mouth, is

the first step of the digestive process.

3- In the stomach, the second step of the

digestive process begins.

4- The last step in the digestive process is

absorption.

2 SUPPORTING DETAILS 1- . Groups of organs, such as the mouth,

esophagus, stomach, and intestines,

work together to perform this complex

task. Digestion is the process of

breaking down food from large

molecules into small ones to make it

easier for absorption.

2- After food enters the mouth, the teeth

Page 3: A Process of Digestion

chew it. Saliva, which is produced by

the salivary glands, plays a major role

in breaking down the food into smaller

pieces. These small pieces travel to the

stomach through the esophagus.

3- When the chewed food reaches the

bottom of the esophagus, a valve lets

the food enter the stomach.

Contraction of the stomach wall mixes

the food. Acidic gastric juices, which

are secreted by the gastric glands in

the stomach, help in mixing the food

and in turning it intoa partial liquid so it

will have the ability to move into the

small intestine.In the small intestine,

enzymes are secreted, and digestion is

completed.

4- Absorption takes place in the small

intestine. The wall of the small intestine

is lined with small, finger like

projections called villi. Small molecules

of food are absorbed by the huge

number of villi. Someof these absorbed

molecules enter the bloodstream to be

distributed throughout the whole body.

5- Ingestion, which occurs in the mouth,

helps to increase the surface are of the

food particles and prepares them for

digestion. In the stomach, digestion

begins, and it continues until it reaches

the small intestine, where absorption

Page 4: A Process of Digestion

takes place. The digestive process

maintains organisms' lives by providing

them with energy needed for different

functions.

4 COHESIVE DEVICES 1- Groups of organs, such as the mouth,

esophagus, stomach, and intestines,

work together to perform this complex

task.

2- After food enters the mouth, the teeth

chew it.3- These small pieces travel to the

stomach through the esophagus.

4- In the stomach, the second step of the

digestive process begins.

5- Acidic gastric juices, which are

secreted by the gastric glands in the

stomach, help in mixing the food and in

turning it into a partial liquid so it will

have the ability to move into the small

intestine.

6- Some of these absorbed molecules

enter the bloodstream to be distributed

throughout the whole body.

7- In the stomach, digestion begins, and

it continues until it reaches the small

intestine, where absorption takes

place.

5 CONCLUDING SENTENCE   In conclusion, the digestive process involves

three major steps: ingestion, digestion, and

Page 5: A Process of Digestion

absorption.

Page 6: A Process of Digestion

Vacationing at the Beach or in the Mountains

People are always looking forward to their vacation period. There are many

options where to choose. I think that the two most common places people choose for

taking a vacation are the beaches and the mountains. Both places offer a variety of fun

activities. The beach offers activities that the mountain cannot offer and vice versa. The

mountain and the beach are totally different. The purpose of this essay is to contrast the

climate, types of activities and locations of beaches and mountains.

I’m going to discuss mountains first. The three aspects I’m going to discuss are

climate, types of activities and location. Climate is always important in order to enjoy

vacations. If a person dislikes cold weather, he or she might have a hard time in the

mountains. The cold climate in the mountains is the first barrier to enjoying them, but

the climate and the temperature of these zones also determine the types of activities

they offer. Snowboarding, mountain climbing, mountain biking, hiking, and skiing are

some activities people can enjoy when going to the mountains. There are many regions

that have mountains where people can go and have a great vacation. Canada is a

country located in North America and contains many mountain vacation sites where

people can go and have fun.

I’m going to discuss the beach second. The three aspects I’m going to discuss

are climate, types of activities and location. Warm climate is one of the most important

features that the beach has. Sun and fun are two words that describe the beach. The

temperature in those places is always hot. The sea and the warm climate determine the

activities that are available at the beach. People can swim, play volleyball, play soccer,

and ride water bikes. In most coastal sites, there are discos and restaurants where

people can dance or party throughout the night. Mexico offers many amazing coastal

sites to visit. Acapulco and Cancun are two of the most beautiful and famous beaches in

the word.

Page 7: A Process of Digestion

It doesn’t matter what place a person decides to choose. The fun is 100%

guaranteed. People often choose one of these two options to spend their vacations.

Depending on what the person likes is what he or she will choose. I like the beach

better than the mountains, but sometimes it is better to take a risk and try a different

place to enjoy. 

Page 8: A Process of Digestion

EFFECTS OF WATCHING TOO MUCH TV

 

Discoveries and invention of devices  are always welcome till we, humans, find a

way to abuse its benefits and be adversely affected by it. This was the case when

Wilhelm Roentgen discovered x-ray and within five years, the British Army was using a

mobile x-ray unit to locate bullets and shrapnel in wounded soldiers in the Sudan. TV

was also invented with positive thoughts in mind – there would be no national borders,

education and communication would be worldwide, etc. However, we are now trying to

overcome its physiological and psychological adverse effects on human beings.

 

One of the physiological effects of watching TV in excessive amounts is eye-

strain. It is true that there are specifications for watching TV; TV should be 5 m. away

from the eye, the room should be adequately lit, TV should be placed at the same

height with our eyes, etc. However, these do not prevent our eyes from getting tired if

we keep watching TV for a long time. Another effect is obesity, which is widely observed

in people who like watching TV and eating snacks  everyday (there is even a term “TV

snacks” to refer to fast food that is suitable for eating in front of the TV). TV is such a

powerful machine that people cannot get away from it – it is addictive.

 

Apart from the physiological effects, TV also causes psychological effects. One 

is a result of being exposed to violence. After seeing so many violent scenes on TV,

people start considering violent actions normal and they lose their sensitivity to their

environment. Partly connected to this effect, the interpersonal communication among

people decreases. Being insensitive to the suffering of other people causes people to

become alienated. Also, after coming home from work people seek to relax in front of

the TV, and generally people prefer watching TV to talking to each other. This issue is

very important since lack of interpersonal relationships mostly end with divorces.

 

Page 9: A Process of Digestion

Shortly, inventions are meant to be beneficial for human beings, if we know how

to benefit from them. TV is one of such inventions that need to be used for the right

purpose only – being educated and entertained for a reasonable (according to age)

period of time. We may, then, be safe from or at least reduce the adverse physiological

and psychological effects of watching too much TV.

Page 10: A Process of Digestion

TOPIC: ENVIRONMENT

Most people want to help the earth but very few actually go out and do

something. To help the earth we don’t have to clean up ten miles of highway or

beaches. We can do those things but I found some easier ways to help out. Malaysians

working together can help to make our environment better, healthier and cleaner.

We can help prevent air pollution by using alternative ways of traveling.

In Malaysia most people use cars and almost every person in the family has their own

car. By having so many cars, we cause air pollution. What should we do about that?.

We could use more public transportation like the train, bus or light rail. All those types of

transportation are great for saving gas, saving time spent in traffic, and it can be a place

to meet interesting people.

Another way, that we can do, to help prevent air pollution is using the carpool

line. We know how bad is the traffic during rush hours and how bad we want to use

carpool, and we do. As an example I would like to tell what I’m doing for helping our

environment. First, I call my friends if they want to go shopping. If they agree I’m picking

them up, and we are going together.

To put in a nutshell, helping save the environment is very important for us and for

our future generations. If we can start working together our planet can stay cleaner,

more beautiful and safer for our children. We shouldn’t be afraid to do something about

that. If other people will see that we care, we really can do something, and they will do

to. Working together can make miracles.