SCIENCE UNIT 2

1. Respiratory system

1.1. We need oxygen to give it to our cells and to produce energy.

1.2. Nose and mouth

1.3. Trachea

1.4. Bronchi

1.5. Bronchioles

1.6. Alveoli

2. Excretory system

2.1. It eliminates waste products from our body

2.2. There are two types: the urinary system and the sweating.

2.3. URINARY

2.4. Kidneys

2.5. Ureters

2.6. Bladder

2.7. Urethra

2.8. SWEATING

2.9. Skin which have pores

3. Digestive system

3.1. The mouth

3.2. The oesophagus

3.3. The stomach

3.4. The small intestine

3.5. The large intestine

3.6. Nutrients are the subtances that we extract from the digestive sysem.

4. Circulatory system

4.1. It carries oxigenated blood to all the parts of the body.

4.2. Blood

4.2.1. Plasma

4.2.2. Red blood cells

4.2.3. White blood cells

4.2.4. Platelets

4.2.5. Arteries

4.2.6. Veins

4.2.7. Capillaries

4.3. The heart

4.3.1. Is a muscle that pumps the blood.