Figure 4

Comparison of nuclei and mitochondria between hydrated and anhydrobiotic H. exemplaris. (a–d) Transmission electron microscopy images. DC: digestive cell, m: mitochondria, mv: microvilli, n: nucleus, ses: specific extracellular structure. Arrowheads delimit the nuclear envelope. (e) Mean mitochondrial size. Error bars indicate the standard deviation, and the star indicates a significant difference (Student’s t-test, α = 0.05). Table 1 shows the complete statistical results. (f,g) Histogram of the mitochondrial size frequencies for hydrated tardigrades (F) and desiccated tardigrades (G).