Head-Foce View Lips Mouth Stylet tip Mouth Esophogus Med an bulbs esophagus 雌 Nerve ring 雄 同 Testis 形 Soern Cross section of nemotode Mole ond famole odulls of d ypicol plant-porositic nemotode GURE 15-2 Morphology and main characteristics of rypical male and female plant parasiric nematodes 雌雄同形