Figure 2.

The average perimeters of yolk sac tissue endodermal epithelial cells (EECs) throughout incubation in 3 IT groups; control 37.8°C (round dots), cold 36.3°C (square dots), and hot 39.3°C (triangular dots). Cross-section perimeters were measured on histological sections (shown in Figure 3). Data were analyzed by one-way ANOVA, Student t test. Means with different letters differ significantly between groups at each age (P ≤ 0.05). n = 36 cells per age (12 cells × 3 tissues).