Liver and bile

Liver 1

Stomach 2

Digestive system 3

Digestive system 2

Digestive system 1

Blood circulatory system 1

Kidney 2

Kidney 1

Heart 1

Ear 4

Ear 3

Ear 2

Ear 1

Bowmann Capsule

Alveoli 2

Alveoli 1

Ovum 1

Ovum and sperm 1

Sperm 1

Eye 2

Zygote 28 days

Zygote 26 to 30 days

Zygote 23 to 26 days

Zygote 22 days

Zygote 2 cells

Short sightedness vision

Foetus 14 weeks

Fetus 14 weeks

Digestive system 2

Fetus 12 weeks

Fetus 11 weeks

Nerve cell 1

Teeth

Long sightedness vision

embryo 6 weeks

Stomach

Digestion system

Lungs

Atom

Observation

Microscope

Lungs

Investigation