Introduction to Biology set of prepared slides is perfect for elementary and high school level students who are interested in learning about the building blocks of science and nature through the lens of a microscope (sold separately) Each slide is clearly labeled for easier identification of the specimen it contains Specimens are sealed behind a cover slip made from high-quality optical glass Included slotted slide case makes it easy to safely store and organize the slides Set of 15 slides includes the following specimens: Conjugation of Spirogyra, Lichen (w.m.), Moss Cluster (w.m.), Spinal Cord (t.s.), Wheat Seed (l.s.), Pinus Pollen (w.m.), Stem of Dicotyledon (t.s.), Stem of Monocotyledon (t.s.), Triticum Aestivum Leaf Epidermis (w.m.), Terminal Bud (l.s.), Single Cell Zoo (w.m.), Animal Cell Mitosis, Cardiac Muscle (sec.), Blood Smear, and Kidney (l.s.)