The human digestive system

Page 1

Natural Science 2 ESO.

Material creat per Marian Ruiz Sim贸n- Projecte AICLE- Escola T煤rbula 2014-15


Multicellular livings had to bring nutrients to all the cells in the body and, at the same time, to take away waste materials. So all multicellular livings have some systems specialised in the function

of nutrition. Those

systems are:

1. Digestive system, the system that changes food into a form that can be used by the body.

2. Respiratory system, the system that brings in oxygen for the body to use and take away carbon dioxide.

3. Circulatory system, the system that carries gas, nutrients and waste to and from all cells through the body.

Excretory system, the system that excretes waste.

We need all of them. Really? Why?

Let’s find it out ! Material creat per Marian Ruiz Simón- Projecte AICLE- Escola Túrbula 2014-15


Matching: draw a line from words to their definitions.

A) Circulatory System

1) The System of organs that produce, collect, and eliminate urine.

B) Digestive System

2) The System of organs and glands responsible for the ingestion, digestion, and absorption of food.

C) Respiratory System

3) The System that circulates blood through the body

D) Urinary System

4) The System of organs involved in the intake and exchange of oxygen and carbon dioxide between the body and the environment

Material creat per Marian Ruiz Simón- Projecte AICLE- Escola Túrbula 2014-15


Classify these organs in the chart Stomach Trachea Kidneys

Veins Arteries Liver

Lungs

Heart

Intestine

Capillaries

Bronchi

Bladder

SYSTEMS AND ORGANS THAT TAKE PART IN NUTRITION Digestive

Respiratory

Excretory

Circulatory

Material creat per Marian Ruiz Sim贸n- Projecte AICLE- Escola T煤rbula 2014-15


Complete the text: Nutrition is _________________. Therse are: Digestion,__________, ____________ and ____________. With circulation the blood distributes the ______________ and __________that we need for every part of our body. When the blood travels through the small intestine, it picks up ____________. When the blood passes through the lungs, it picks up _____________ and removes ____________. The __________ filter the blood. ________________ are eliminated.

Use the following words:

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Material creat per Marian Ruiz Simón- Projecte AICLE- Escola Túrbula 2014-15


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Material creat per Marian Ruiz Sim贸n- Projecte AICLE- Escola T煤rbula 2014-15


The human digestive system is a complex series of organs and glands that processes food. In order to use the food we eat.

Parts of the

Material creat per Marian Ruiz Simón- Projecte AICLE- Escola Túrbula 2014-15


Our digestive system is a 9 meter- long- tube. The digestive process begins in: dissolve the MOUTH, where the teeth and tongue break up the food after it has been softened with saliva. Then the food is masticated and ingered.

goes down The food travels down the ESOPHAGUS to the stomach.

While the food is in the STOMACH it is mixed with a mild acid which breaks the food down into a paste similar to porridge.

The food then passes, a little at a time into the SMALL INTESTINE, which is roughly 6 meters long. Here the food is broken down even further until it is small enough to pass through the walls of the small intestine into the bloodstream. The blood then carries the digested food all around the body.

Food that cannot be digested passes into the LARGE INTESTINE, where the water and minerals are absorbed into the blood stream.

The solid waste, the feces, is then expelled from the body through the RECTUM and . ANUS. Material creat per Marian Ruiz Sim贸n- Projecte AICLE- Escola T煤rbula 2014-15


Material creat per Marian Ruiz Simón- Projecte AICLE- Escola Túrbula 2014-15


ENGLISH

CATALÀ

DEFINITION

BILE

BILIS

a bitter liquid that helps to digest food . It’s produced by the liver. the thick fluid mass of partially digested food that leaves the stomach

CHYME

QUIM

DIGESTION

DIGESTIÓ

the act of breaking down ingested food into soluble substances that can be absorbed

GALLBLADDER

VESÍCULA BILIAR

a small organ in the body like a bag connected to the liver which stores bile.

LIVER

FETGE

a large organ in the body that cleans the blood and produces bile

PÀNCREES

an organ in the body that produces insulin (= a chemical substance that controls the amount of sugar in the blood) and substances that help to digest food so that it can be used by the body

PANCREAS

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Material creat per Marian Ruiz Simón- Projecte AICLE- Escola Túrbula 2014-15


1.

Write the names of the organs of the digestive system in the blanks:

Digestion begins in the _______________________ .

Food gets from the mouth to the stomach via the _____________

In the ________________ the food is mixed with the gastric juices.

Digestion ends at the ___________________ .

2.

Complete the chart: Stage of digestion 

Organs involved

Chewing

 

Stomach



Absorption



3.

Large intestine and anus.

Put the following words in order: Absorption

digestion

elimination of waste

The stages of digestion 1

2

3

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Why is this system vital? Paragraph 1: introduction We have been working on the ________________ system and we have come to the conclusion that we cannot live without this system. Or We have been working on the _______________ system and we would like to tell you why this system is vital to live.

Paragraph 2: elaborate your arguments On the one hand, this system is ____________________________. Besides, _____________________________ because _________________. This system is crucial because _________________________________

Paragraph 3: conclusion We would like to conclude by saying that the _________________ system is a must to live because _____________________________________.

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