NATURAL SCIENCE

1. circulatory system

1.1. delivers blood to the body's

1.1.1. veins

1.1.2. arteries

1.1.3. capillaries

2. respiratory system

2.1. Our cells need oxygen

2.1.1. trachea

2.1.2. alveolus

2.1.3. bronchus

2.1.4. bronchiole

2.1.5. diphragm

3. excretory system

3.1. the waste excretes carbon dixide

3.1.1. renal arteries

3.1.2. kidney

3.1.3. ureter

3.1.4. bladder

3.1.5. urethra

4. digestive system

4.1. is the body

4.1.1. salivary glands

4.1.2. s

4.1.3. liver

4.1.4. s

4.1.5. anus