成虫 Flagella forming"flame A Tubule Cerebral lame Tube cell Lateral ganglia Osmoregulatory nerve tubule Seminal vesicle Intestine Oviduct Penis Diverticulum Testis Pha deferens Seminal Mouth receptacle Vagina Transverse Mouth Genital Phat FIGURE 16-7 Structure of a planarian. Back A, Reproductive and osmoregulatory systems, shown in part Inset at left is en largement of flame cell. B, Digestive tract and ladder-type nervous system. Pharynx is shown in resting position. C, Pharynx extended through ventral mouth成虫 Back