Liver Organ silueta 8 months 1 Liver silueta 8 months 1 Liver silueta 8 months 1 Liver silueta 8 months 1 Liver silueta 8 months 1 Kidney silueta 8 months 2 Kidney silueta 8 months 2 Kidney silueta 8 months 1 Kidney silueta 8 months 1 Kidney silueta 8 months 1 Kidney silueta 8 months 1 Kidney silueta 8 months 1 Spine silueta 11 months 2 Fetus silueta 11 months 9 Lungs silueta 11 months 2 Lung Organ silueta 11 months 1 Lung Organ silueta 11 months 1 Lungs silueta 11 months 2 Lungs silueta 11 months 1 Lungs silueta 11 months 2 Lungs silueta 11 months 0 Lungs silueta 11 months 1 Lungs silueta 11 months 2 Heart Organ silueta 12 months 2 Lidské srdce silueta 12 months 2 Lidské srdce silueta 12 months 0 Lidské srdce silueta 12 months 2 Lidské srdce silueta 12 months 2 Lidské srdce silueta 12 months 0 Lidské srdce silueta 12 months 3 Foot Feet Sole - Bottom silueta almost 1 year 6 Muscle silueta about 1 year 2 Muscle silueta about 1 year 3 Spine silueta about 1 year 1 Rib cage silueta about 1 year 2 Biceps Muscle silueta about 1 year 0 Brain silueta about 1 year 1 Brain silueta about 1 year 17 Brain silueta about 1 year 2 Brain silueta about 1 year 3