The document summarizes the key body systems involved in nutrition: the digestive system, which breaks down food; the respiratory system, which provides oxygen; the circulatory system, which transports nutrients; and the excretory system, which removes waste. It describes the major organs and processes of each system that work together to carry out the function of nutrition and keep our cells supplied with energy.

1. SCIENCE
NUTRITION
PAULA CRESPO GONZÁLEZ

2. NUTRITION
$ The function of nutrition gives our cells all the
energy they need to perform their life processes.
Four body system carry
out the function of nutrition :
* Digestive system: It is in charge of digestion
* Respiratory system: It is in charge of breathing
* Circulatory system: It transports nutrients and
oxygen
* Excretory system: it transports them to taken

3. THE NUTRIENTS WE
NEED TO LIVE

4. DIGESTION AND DIGESTIVE
SYSTEM
$ Digestion is the process in which food changes into
nutrients. It takes place in the digestion system,
which has two parts :
* The disgetive tract .
* Glands .

5. Digestive system

6. Breathing and excretion
$ Breathing is the process where the body takes in
oxygen and releases carbon dioxide. Two
processes take place when we breathe :
* Lung ventilation .
* Exchange of gases .
$ the respiratory system carries out breathing . It
consists of:
* Respiratory tract .
* Lungs .

7. THE RESPIRATORY
SYSTEM

8. THE EXCRETORY
SYSTEM
$ The excretory system is the elimination of the waste
subtances collected in the blood that cells have produce.
The excretory system is in charge of excretion and it is
made up of :
* Sweat glands. They are in the skin
* Urinary system. It is made up of:
_ Kidneys
_ Unirary tract

9. THE URINARY
SYSTEM

10. CIRCULATORY
SYSTEM
$ Circulation is the transportation of blood, carrying
nutrients and oxygen to all the cells .
$ The circulatory system is made up of :
* Heart.
* Blood.
$ Blood vessels. There are three types of blood
vessels:
- Arteries.
- Veins.
- Capilares.

11. THE CIRCULATORY
SYSTEM

12. BLOOD
$ Blood is a red liquid tissue made up of cells
that fload in a nutritious liquid called
plasma.
$ blood cells . There are different types of
cells:
* Red blood cells.
* white blood cells.
* Platelets.
$ blood plasma. It is a liquid made up of
water with dissolved salts and nutrients.

13. BLOOD

14. THE HEART
$ It is a muscular organ located in the chest . It is
between the two lungs and slightly tilted to the
left.
$ Each half of the heart is divided into two cavities :
* Atrium
* Ventricle
* Systole
* Diastole

15. THE HEART

16. THE
END