Key+words+and+meanings

=Key Words= Key words will help you search for the best information. The key words are coloured ** green **. Use your key words when skimming and scanning texts and websites. Below are important key words and their meanings.

**Veins:** tubes that carry the blood around the body.
 * Circulatory system **
 * Blood **: a red liquid that carries oxygen through veins and arteries.
 * Heart **: a muscle that pumps the blood around the body.


 * Repiratory system **
 * Breathing: **the process of moving air in and out of the lungs.
 * Lungs: **a large organ, inside the ribcage, that helps you breathe.

**Digest:** the process where food is changed into a form that can be used by the body.
 * Digestive system **
 * Stomach: **an organ inside our body which digests the food.