The Developmental Toxicity of Thymus schimperi Essential Oil in Rat Embryos and Fetuses

Figure 4

A 20-day-old rat fetus fixed in Bouin’s solution for visceral examination (260 mg/kg). (a) Unsectioned fetus; (b) transverse section of the brain showing normal brain tissue; (c) normal palate; (d) a section made through the neck showing the normal esophagus, trachea, and thyroid gland; (e) a section made through the chest showing normal; (f) intact diaphragm; and (g) a section made through the abdomen showing normal visceral organs.