UNIT 2

1. Circulatory System

1.1. delivers blood to the body,s tissues trohugt a heart rate net work of blood vessels

2. Respiratory System

2.1. our cells need oxigen to combine with nutrientsand to produce energy .

2.1.1. parts

2.1.1.1. trachea,alveolus,bronchus,bronchiole,diaphragma

3. https://www.youtube.com/watch?v=8QOObtVlyRI

4. THE DIGESTIVE SYSTEM

4.1. is the group of organs in the body that extract nutrients from food and expel undigested waste

5. Nutrientes

5.1. are the substances wich plants and animals need in order to live and grow.

6. Parts

6.1. salivary glands,oesophagus,liver,large intestine,anus,stomach,pancreas,small intestine ,rectom