The document summarizes the key functions of the digestive, respiratory, excretory, and circulatory systems. It describes how nutrients are broken down and absorbed in the digestive system and carried via the blood. It explains that the respiratory system intakes oxygen and removes carbon dioxide. The excretory system filters waste from the blood through sweat glands and the urinary system. The circulatory system transports blood, nutrients, oxygen, and waste throughout the body using the heart, arteries, veins, and capillaries.

1. NUTRITION
BY CLARA HERNANDEZ PEREZ

2. NUTRITION
Nutrients give our cells all the energy they need.
The digestive system the respiratory system
the circulatory system and excretory system
carry out function of nutition.
THE DIGESTIVE SYSTEM
The digestive system it has two parts, the
digestive tract and the digesrive glands.

3. MOUTH
The mouth has salivary glands that
produce saliva, teeth that chew food and
a tongue that mixes chewed food with
saliva to form a ball of food

4. THE PHARYNX
The pharynx connects the mouth and the
oesophagus.

5. THE OESOPHAGUS
The oesophagus transports the food to the
stomach.

6. THE STOMACH
The stomach is where the food mixes with
gastric juices.

7. THE LIVER
The liver secretes bile.

8. THE PANCREAS
The pancreas helps in the digestion of
protein.

9. THE SMALL INTESTINE
The small intestine is the longest part of the
digestive tract.Nutrients pass into the blood
through its walls.

10. THE LARGE INTESTINE
The large intestine absorbs water which
passes to the blood .
And finally, undigested substances are
expelled through the anus.

11. THE RESPIRATORY SYSTEM
The respiratory system is in change of
breathing.
Breathing makes two movements.
First, we inhale air and it goes into the
lungs.
Then, we exhale air sending it out of the
lungs.

12. THE NOSTRILS
The nostrils filter the air .

13. THE PHARYNX
The pharynx connet de larynx, the oesophagus
and the trachea.

14. THE LARYNX
The larynx contains the vocal cord.

15. THE TRACHEA
The trachea is a tube that takes air into the
bronchis.

16. THE BRONCHI
 The bronchi are two branches of the trachea

17. THE LUNGS
The lungs are spongy organs made up of
small sacs called alveoli.

18. THE DIAPHRAGM
The diaphragm is the muscle than creates the
movements.

19. When we breathe, the oxygen in the
air goes to the blood through the
alveoli, and the carbon dioxide from the
blood is released outside the body.

20. THE EXCRETORY SYSTEM
The excretory system filters waste substances
from the blood. It removes them from the body
through excretion.
The excretory system is made up of:
Sweat glands
The urinary system. This is made kidneys and
urinary tract.

21. THE URINARY SYSTEM
The kidneys remove waste substances from
the blood and they make urine
.

22. THE URETERS
The ureters take urine from the kidneys to the
bladder.

23. THE BLADDER
The bladder stores the urine.

24. THE URETHRA
The urethra connets the bladder to the outside.

25. THE CIRCULATORY SYSTEM
The circulatory system transports nutrents and
oxigen to cells .It is made up of the heart, blood
and blood vessels.

26. THE HEART
The heart is a muscular organ that pumps
blood around the body.

27. BLOOD
The blood collects oxygen from the alveoli and
nutrients and transports them to all the cell. It
also collects waste substances and takes them
to the sweat glands and the urinary system.

28. BLOOD VESSELS
The blood vessels are the tubes through which.
There are three types: arteries, veins and
capillaries.

29. ARTERIES
The arteries carry blood from the heart to the
rest of the body.

30. VEINS
The veins carry blood from all over the boby
back to the heart.

31. CAPILLARIES
The capillaries are very thin vessels that reach
all the cells of the body.

32. THE BLOOD
Blood is a red liquid tissue made up of cells
that float in a liquid called plasma.
There are three types of blood cells, red blood
cells. White blood cells and platelets.

33. *Red blood cells carry oxygen.
*White blood cells remove bacteria
and viruses from the blood.
*Platelets are small fragments of
Cells tha form blood clots when a
Blood vessel breaks.

34. THE HEART
The heart use rhythmic systole and diastole
movements to pump the blood around the
body.
The systole is the movement of contraction.
The diastole is the movement of relaxation.

35. Blood enters the atria through the veins.
Passes to the ventricles and valves that prevent
blood comes out.
Of the ventricles, throug the arteries and travels
all over the body.

36. HUMAN CIRCULATION
Human circulation is closed.In mammals, the
heart septum separates the two halves of the
heart.
Human circulation is double. The blood follows
two routes
-Pulmonary circulation. The blood carbon dioxide
through the pulmonary artery.
-systemic circulation.The blood with oxygen

37. THE END