This document provides information about four main body systems - the circulatory, digestive, respiratory, and excretory systems. It describes the key functions of each system, including that the circulatory system transports oxygen and nutrients throughout the body, the digestive system extracts nutrients from food and removes waste, the respiratory system intakes oxygen and releases carbon dioxide, and the excretory system eliminates liquid waste from the body. Each section also outlines the basic process that each system follows to carry out its functions.

1. made by Irene , marta and paula The
SYSTEMS

2. .
CIRCULATORY
SYSTEM
What does the blood do?
·It carries oxygen and
nutrients to all parts of the
body.
·It collects the carbon
dioxide that we don’t need.

3. Types of vessels
· ARTERIES:They carry
oxygen.
·VEINS:They carry carbon
dioxide.
·CAPILLARIES:They conect
veins and arteries.

4. DIGESTIVE SYSTEM
7.Then the blood vessels in the small intestine
absorbs the nutrients.
8.The circulatory systems carries the nutrients
to all parts of the body.
9.Large intestine:It stores the waste products
that we dont need. It absorbs water
10.Finally, thewaste products are expelled
trought the rectum and the anus.
WHAT DOES IT DO?
·It extract the nutrtients from the
food.
·it expels the waste substance that
our body doesn’t need.
1.In the mouth the teath chew the
food.the salivary glands produce
saliva.Saliva help us make a bolus.
2.Then the bolus goes to a small
tuve called oesophagus.
3.Then the bolus reaches the
stomach.
4.After that,the gastric juices break
down the bolus and transform it into
a thick liquid.
5.Gastric juices also kill dangerous
bacteria in the stomach.
6.The bile produced in the liver and
the pancreatic juices produced by
the pancreas are mixed with the
thick liquid produced in the stomach

5. RESPIRATORY SYSTEM

6. • It collects oxygen from the air. The oxygen is mixed with nutrients to produce
energy.
• It releases the carbon dioxide that our body doesn´t
• 1 First, the air enters through the nose and mouth.
• 2 Then, the air goes down the pharynx and the trachea.
• 3 The trachea is a long tube that divides into two smallest tubes called bronchi.
• 4 The bronchi are divided into lots and lots of bronchioles. The bronchioles are like
branches.
• 5 At the end of bronchioles, we can find alveoli, alveoli are covered with capillaries
(some are covered in blue and some in red)
• 6 In alveoli the exchange of gases takes place. The red capillaries absorb oxygen
and the blue capillaries absorb carbon dioxide.
• 7 Finally, the carbon dioxide is expelled.

8. .What does it do?
.It eliminates the waste products that our body doesn´t need
·It is made up of: Urinary system and sweat glands
·WHAT DOES IT ELIMINATE?
It eliminates: Urine,wich is a misture of waste products and water.
1.First, the renal arteries carry blood to the kidneys.
2. Next, the kidneys eliminate the waste products and they are mixed
with water. This is called urine.
3.Then the urine goes down through the ureters and reach the bladder.
4.When the bladder is getting full our brain tells us to go to the toilet.
5. Finally, urine is released through a tuve called urethra.

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PRESENTATION