Science

1. Digestive system

1.1. Nutrients

1.1.1. Nose

1.1.1.1. Mouth

1.1.2. Parts

1.1.2.1. Nose

1.1.2.1.1. Mouth

1.1.2.2. video

1.1.2.2.1. k

2. Circulatory system

2.1. Heart

2.1.1. Veins

2.1.2. Artery

2.2. Parts

2.2.1. Heart

2.2.2. Veins

2.2.3. Artery

2.2.3.1. Capilary

2.3. video

2.3.1. Employee

3. Respiratory sytem

3.1. Lungs

3.1.1. Oxigen

3.1.1.1. Carbon dioxid

3.2. Parts

3.2.1. Nose and mouth

3.2.2. Trachea

3.2.2.1. Lungs

3.2.2.1.1. Bronchoiole

3.2.3. video

3.2.3.1. s

4. Excretory system

4.1. Kidney

4.1.1. Urinary system

4.1.2. Sweat glands

4.2. Parts

4.2.1. Renal arteries

4.2.1.1. kidney

4.2.1.1.1. Ureter

4.2.2. Bladder

4.2.2.1. Urethra

4.3. video

4.3.1. e