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Fig. 5 | Frontiers in Zoology

Fig. 5

From: Evidence for cell turnover as the mechanism responsible for the transport of embryos towards the vagina in viviparous onychophorans (velvet worms)

Fig. 5

Cell proliferation in the genital tract of E. rowelli. Nuclei stained with DAPI are represented in gray, condensing DNA and chromosomes of dividing cells (α-PH3 labeling) in orange. Proximal is up in all images. a Overview of a complete genital tract. b Detail of the ovary containing oocytes of different sizes. Arrowheads point to proliferating cells in the stalk of an intermediate-sized oocyte. c Oviduct with seminal receptacle. Note that only a small number of dividing cells is detectable in the oviduct (arrowheads). d Proximal part of the uterus containing the youngest embryo. Abbreviations: cd; common duct/vagina; d, distal; oc, oocyte; ov, ovary; p, proximal; sr, seminal receptacle, ut, uterus. Scale bars: A: 1 mm; B, D: 200 μm; C: 100 μm

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Frontiers in Zoology

ISSN: 1742-9994