Natural - Unit 4: Our Systems

1. OUR SENSES
We have five senses and each sense has an organ.

1. Sight - The organs of sight are the eyes and we use them to identify colour, size, shape and     distance.
2. Taste - The organ of taste is the tongue and we use it to identify different flavours.
3. Touch - The organ of touch is the skin and we use it to identify if something is hot or cold, hard       or soft, smooth or rough.
4. Hearing - The organs of hearing are the ears and we use them to identify loud, quite, high and         low sounds.
5. Smell - The organ of smell is the nose and we use it to identify different smells.

Our sense work together with our nervous system.

2. OUR NERVOUS SYSTEM
The nervous system is made up of the brain, the spinal cord and the nerves.

1. Brain - The brain controls everything that happens in our bodies.
2. Spinal cord - The spinal cord connects most nerves of our body to the brain.
3. Nerves - The nerves carry messages to the brain.

3. OUR LOCOMOTOR SYSTEM
Our locomotor system makes our body move and it is made up of bones, joints and muscles.
It uses nutrients from food and oxygen to work.
We use our locomotor system to move, eat and speak.

1. Bones - We have 206 bones and they are hard and rigid. Bones make up the skeleton and they         support the body and protect vital organs.

2. Joints - Joints are where two or more bones meet. At the joints, tendons attach muscles to the         bones. They allow us to bend.

3. Muscles - We have 600 muscles and they are elastic and flexible. We can move some of them (biceps), and other muscles move automatically (heart).


4. OUR CIRCULATORY SYSTEM
Our circulatory system carries nutrients and oxygen around the body. It is made up of the heart, the blood and the blood vessels.

1. The heart - It is a muscle the size of your fist and it´s in the middle of the chest. It works day and night to pump blood to every part of the body.

2. The blood - It is a red liquid that goes around the body. It travels in blood vessels.

3. The blood vessels - They are thin tubes through which the blood circulates.

5. OUR RESPIRATORY SYSTEM
When we breath in, oxygen enters our blood through the respiratory system.
When we breath out, the carbon dioxide leaves our body.
The respiratory system is made up of the nostrils, the windpipe, the bronchi and the lungs.

1. The nostrils - The nose has two holes called nostrils where the air enters our body.

2. The windpipe - It is a tube that carries air to the lungs.

3. Bronchi - Two tubes of the windpipe that carry the air to the lungs.

4. The lungs - They are two sacks made up lots of little sacks where the air goes in.

The process 
1. When we breath in, oxygen enters through the nostrils.
2. Next, it passes through the windpipe and goes down the bronchi into the lungs.
3. Then, the oxygen passes from the air into the blood and the carbon dioxide passes from the blood into the air.
4. Finally, the carbon dioxide leaves our body when we breath out.

6. OUR REPRODUCTIVE SYSTEM

Our reproductive system allows us to have babies.

Men and women have different reproductive systems.

Social - Unit 3: Europe

Europe is the second smallest continent in the world and it is in the Northern Hemisphere.
- to the north of Europe there is the Arctic Ocean
- to the south there is the Mediterranean Sea and the Black Sea
- to the west there is the Atlantic Ocean
- and to the east there is Asia

On relief maps of Europe we can see:

1. MOUNTAIN RANGES
    Europe´s most important mountain ranges are:

    - The Ural Mountains
      They are in Russia and they form a natural border between Europe and Asia.
      The Ural Mountains are Europe´s longest mountain range.
   - The Alps
     They are the highest mountain range in Europe.
     The Alps are in seven different European countries, such as France, Italy, Switzerland and                    Austria.
     The highest mountain in the Alps is Mont Blanc.
   - The Scandinavian Mountains
     They are on a peninsula in the north of Europe and form a natural border between Norway and            Sweden.
     They´re on of the oldest mountain ranges in the world.


2. RIVERS
    Europe´s most important rivers are:

   - The Volga
      It is in Russia and it´s the longest river in Europe. It flows into the Caspian Sea.
   - The Danube
      It is the second longest river in Europe and flows into the Black Sea.
   - The Rhine
      It starts in the Alps and it flows into the North Sea.


On political maps of Europe we can see many countries and cities. There are 47 different countries in Europe and each one has its own traditions and, many, their own language.

We are going to study some of them:

Try now some games... Game 1   Game 2