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Opened up along its length, this paramecium cutaway shows the slipper-shaped cell fringed with rows of cilia around its whole edge. Inside, a large macronucleus sits beside the curving oral groove, while star-shaped contractile vacuoles sit at each end and food vacuoles are scattered through the cytoplasm. The layered interior reads clearly from above. It is a classic cell biology classroom model, a handy study aid for microscope lessons and an eye-catching display of single-celled life.

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