Episode: 1 That's Why Carbon Is A Tramp Episode: 2 Water - Liquid Awesome Episode: 3 Biological Molecules - You Are What You Eat Episode: 4 Eukaryopolis - The City of Animal Cells Episode: 5 In Da Club - Membranes & Transport Episode: 6 Plant Cells Episode: 7 ATP & Respiration Episode: 8 Photosynthesis Episode: 9 Heredity Episode: 10 DNA Structure and Replication Episode: 11 DNA, Hot Pockets, & The Longest Word Ever Episode: 12 Mitosis: Splitting Up is Complicated Episode: 13 Meiosis: Where the Sex Starts Episode: 14 Natural Selection Episode: 15 Speciation: Of Ligers & Men Episode: 16 Animal Development: We're Just Tubes Episode: 17 Evolutionary Development: Chicken Teeth Episode: 18 Population Genetics: When Darwin Met Mendel Episode: 19 Taxonomy: Life's Filing System Episode: 20 Evolution: It's a Thing Episode: 21 Comparative Anatomy: What Makes Us Animals Episode: 22 Simple Animals: Sponges, Jellies, & Octopuses Episode: 23 Complex Animals: Annelids & Arthropods Episode: 24 Chordates Episode: 25 Animal Behavior Episode: 26 The Nervous System Episode: 27 Circulatory & Respiratory Systems Episode: 28 The Digestive System Episode: 29 The Excretory System: From Your Heart to the Toilet Episode: 30 The Skeletal System: It's ALIVE! Episode: 31 Big Guns: The Muscular System Episode: 32 Your Immune System: Natural Born Killer Episode: 33 Great Glands - Your Endocrine System Episode: 34 The Reproductive System: How Gonads Go Episode: 35 Old & Odd: Archaea, Bacteria & Protists Episode: 36 The Sex Lives of Nonvascular Plants: Alternation of Generations Episode: 37 Vascular Plants = Winning! Episode: 38 The Plants & The Bees: Plant Reproduction Episode: 39 Fungi: Death Becomes Them Episode: 40 Ecology - Rules for Living on Earth