unit 2: nutrition
TRANSCRIPT
NUTRITION
UNIT 2 NATURAL SCIENCE
HUMAN BEINGS
are living things
THEY PERFORM THREE VITAL FUNCTIONS
INTERACTION REPRODUCTIONNUTRITION
5 senses
Nervous System
Locomotor system
?
NUTRITIONIT IS A VITAL FUNCTION BY WHICH LIVING
THINGS OBTAIN/GET NUTRIENTS AND ENERGY TO GROW AND PERFORM THEIR
DAILY ACTIVITIES OBTAIN ENERGY
NUTRITIONDigestive system
It takes oxygen (O2) from the atmosphere and it
expels CO2.
Excretory system
Circulatory system
Respiratory system
It obtains/gets the nutrients that we need from food and drink
It gets rid of waste or unwanted substances
It transports/carries the nutrients and oxygen to our body cells. It also transports
the CO2 and waste.
NUTRITIONENERGYFOOD
(NUTRIENTS)
OXYGENCARBON DIOXIDE
EAT WELL AND HEALTHILYOur Digestive System BREAKS DOWN the food in
smaller pieces called NUTRIENTS
CARBOHYDRATES
FATS PROTEINS
VITAMINS
A good diet should provide us with all these nutrients in a right quantity
http://www.mcdonalds.ca/ca/en/menu/full_menu/sandwiches.html
WHERE AND HOW CAN WE FIND INFORMATION ABOUT THE FOOD WE EAT?
In the packaging you can find nutritional
contents of that food
ENERGY
NUTRIENTS
FOOD PYRAMID
Why is important to eat well and healthily?
To grow well and to be stronger
To prevent from suffering mental and physical
diseases such as: obesity, heart attacks, anorexia,
bulimia...
What effects can smoking and pollution have in our body?
Respiratory Illnesses such as Bronchitis
and Lung Cancer
What effects can DRUGS have in our body?
DRUGS can interfere in the right functioning of
the BRAIN
DIGESTIVE SYSTEM
FOOD NUTRIENTS
Substances that come from food which living things need in order to live and grow (energy)
It’s a group of organs in the body that extract nutrients from food and expel/get rid of undigested waste
CARBOHYDRATES VITAMINS
FATSPROTEINS
DIGESTIVE SYSTEM
Salivary gland Pharynx
Oesophagus
Stomach
Small IntestineLarge Intestine
Liver
Gallbladder
RectumAnus
Epiglottis
Pancreas
VOCABULARY
CRUSH
CHEW
TRIGGER
SWALLOW To press something with force that destroy it
To Masticate. An action done by your gums and teeth to
crush the food
CHEWING GUM
To provoque, to cause…
To take (food or drink) down your throat with a muscular
action
SQUEEZETo compress something
DIGESTIONOur smell sense triggers the
production of saliva. It’s help the teeth to crush food
as we chew. The tongue shape the food into a ball
called bolus
When we swallow the bolus passes into the oesophagus
(tubes that links the pharynx with the stomach). There is a flap called epiglottis, which
prevent food from going down into the windpipe (trachea)
and into the lungs. The muscles of the oesophagus
squeeze the food to the stomach.The stomach (main role)
breaks down food using its strong muscular walls and producing gastric juices
which mix with the bolus and kill harmful bacteria (quimo)
https://www.youtube.com/watch?v=QvGYvK6qScE
CHOKE: When the airway is blocked you will choke, won’t breath
DIGESTION
In the small intestine, the tiny pieces of food mix with bile (produced by liver) and pancreatic juices (produced by
pancreas). They break down it into nutrients. These nutrients pass
through its walls and are absorbed into the blood
The waste that our body doesn’t need passes to
the large intestine. Here, water is absorbed into
the blood. The solid waste leaves our body
through the anus.
DIGESTION1ST ORGANISATION
2nd KEY VOCABAULRY: ACCURACY
Bile, pancreatic juices, swallow, trigger, crush, teeth...?
3rd GRAMMAR
3rd person
Spelling mistakes
Do the lungs have the same size? Why?
CIRCULATORY SYSTEMBLOOD
(nutrients and oxygen)
BLOOD VESSELS(carry it)
HEART (pump the blood)
CIRCULATIONconnect the heart with
The LUNGS The rest of the body
CIRCULATORY SYSTEMDELIVERS/CARRIES/DISTRIBUTES
BLOOD
THE BODY’S TISSUES
TO
NETWORK (interconnected system)
OF BLOOD VESSELS
THROUGH A
BLOODBLOOD IS CARRIED BY BLOOD VESSELS (ARTERIES, VEINS AND CAPILLARES).
PLASMA: Is 90% water. It carries the nutrients, waste products and other substances
BLOOD VESSEL (vaso sanguíneo)
BLOOD IS A LIQUID SUBSTANCE MADE UP OF:
RED BLOOD CELLS: Carry oxygen and carbon dioxide. Give blood its colour.
WHITE BLOOD CELLS: Fight infeccions. They absorb and kill germs and bacteria which enter the body.
PLATELETS (Plaquetas): Join together when the body loses blood to help stop bleeding.
IMAGINE
BLOOD VESSEL AND PLASMA
RED BLOOD CELLS
WHITE BLOOD CELLS
PLATELETS
BLOOD
WHEN WE LOSE BLOOD WE ARE BLEEDING
BLEED
BLOOD VESSELSARTERY (RED): CARRY BLOOD FROM THE HEART THE REST OF THE BODY. THEY TAKE THE BLOOD AWAY
VEIN (BLUE): CARRY/BRING BLOOD BLACK TO THE HEART. TOWARDS THE HEART.
CAPILLARIES: Tiny blood vessels where nutrients and gases can easily pass
through them to the cells.
HEARTRIGHT SIDE OF OUR BODY? LEFT SIDE OF OUR BODY?
HEART
Each half is divided in two chambers. The one at the top is called atria or atrium (aurícula) and the other chamber at the bottom is called ventricle (ventrículo).
The atrium and the ventricle of the same side are separated by a valve.
The heart is divided in two halves by a thick and elastic muscular wall. Left side (red half) and right side (blue part).
Atriums receive blood coming into the heart. Ventricles pump the blood out of the heart.
ATRIUM
VENTRICLE
TRICUSPID
MITRAL
RIGHT SIDE
LEFT SIDE
HEART
Right ventricle
Right atrium
LEFT ventricle
Superior VENA CAVA
InferiorVENA CAVA
AORTA ARTERY
PULMONARY VEIN (oxygenated blood comes back to the
heart)
LEFT atrium
PULMONARY ARTERY (deoxygenated blood goes to lungs)
CIRCULATION