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women's t-shirts iris women's t-shirts bright field women's t-shirts brightfield women's t-shirts brightfield microscopy women's t-shirts cell women's t-shirts cortex women's t-shirts endodermis women's t-shirts hairs women's t-shirts layer women's t-shirts light microscopy women's t-shirts metaxylem women's t-shirts micrograph women's t-shirts phloem women's t-shirts pith women's t-shirts root women's t-shirts

photographs iris photos bright field photos brightfield photos brightfield microscopy photos cell photos cortex photos endodermis photos hairs photos layer photos light microscopy photos metaxylem photos micrograph photos phloem photos pith photos root photos

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Light micrograph of a transverse section of an iris root showing the central vascular tissues (green), the cortex (large-celled pink tissue) and an outer piliferous layer bearing numerous water-absorbing root hairs. The central vascular tissues are surrounded by a single layer of cells known as the endodermis (dark green ring). Within this is a star-shaped region of dark green xylem, with bays of pale green phloem lying between the arms of the star. The large white cells are water-conducting metaxylem vessels surrounding a small central region of parenchymatous pith.