Lesson 46 of 51
Animal Defense Systems: How Skin, Snot, and Cells Keep Us Healthy: Crash Course Biology #45
Lessons51 lessons
- 1Crash Course Biology Preview
- 2Introduction to Biology: Crash Course Biology #1
- 3The Scientific Method: Crash Course Biology #2
- 4What Biologists Do: Crash Course Biology #3
- 5How Life is Organized: Crash Course Biology #4
- 6Intro to Ecology: Why Did All These Elephants Die?: Crash Course Biology #5
- 7Community Ecology: Interspecies Interactions: Crash Course Biology #6
- 8Population Ecology: How We Saved the Bald Eagle: Crash Course Biology #7
- 9What is Climate Change?: Crash Course Biology #8
- 10The Effects of Climate Change: Crash Course Biology #9
- 11Conservation Biology: Sixth Mass Extinction?: Crash Course Biology #10
- 12Intro to Evolution: What We Can Learn From a Giraffe's Neck: Crash Course Biology #11
- 13Microevolution: What's An Allele Got to Do With It?: Crash Course Biology #12
- 14Natural Selection: Life's Way of Stayin' Alive: Crash Course Biology #13
- 15Population Genetics: Why do we have different skin colors?: Crash Course Biology #14
- 16Speciation: Where Do Species Come From?: Crash Course Biology #15
- 17Evolutionary History: The Timeline of Life: Crash Course Biology #16
- 18Phylogeny: How We're All Related: Crash Course Biology #17
- 19Biological Diversity, Butts, and the Tree of Life: Crash Course Biology #18
- 20Human Evolution: We Didn't Evolve From Chimps: Crash Course Biology #19
- 21Carbon & Biological Molecules: What is Life Made Of?: Crash Course Biology #20
- 22The Unexpected Truth About Water: Crash Course Biology #21
- 23Microscopes: How We See What We Can't See: Crash Course Biology #22
- 24A Tour of the Cell: Crash Course Biology #23
- 25Cell Membranes: How Does Stuff Get Into Your Cells?: Crash Course Biology #24
- 26Why Do Cells Need to Communicate?: Crash Course Biology #25
- 27Chemical Reactions in Biology: Crash Course Biology #26
- 28Cellular Respiration: Do Cells Breathe?: Crash Course Biology #27
- 29Photosynthesis: The Original Solar Power: Crash Course Biology #28
- 30Mitosis & the Cell Cycle: How Cells Clone Themselves: Crash Course Biology #29
- 31Meiosis: Why Are All Humans Unique?: Crash Course Biology #30
- 32Intro to Genetics: Why Your Cat Looks Like That: Crash Course Biology #31
- 33Genetic Traits: Nature? Nurture? Not That Simple: Crash Course Biology #32
- 34DNA Structure & Replication: Our Instruction Manual for Existing: Crash Course Biology #33
- 35Transcription: How mRNA Helped Save Lives: Crash Course Biology #34
- 36Translation: How RNA Gets Translated into Protein Power: Crash Course Biology #35
- 37How Genes Express Themselves: Crash Course Biology #36
- 38Genetic Mutations: Is Drinking Milk a Super Power?: Crash Course Biology #37
- 39Bacterial DNA & Genetics: Crash Course Biology #38
- 40Viruses & Vaccines: How Do Vaccines Work?: Crash Course Biology 39
- 41Bioinformatics: How Data Saves Lives: Crash Course Biology #40
- 42Multicellular Function: Why We Aren’t Just One Big Cell: Crash Course Biology #41
- 43Plant Anatomy & Physiology: Plants Are Hardcore: Crash Course Biology #42
- 44How Animals Turn Resources Into Waste: The Poop Episode: Crash Course Biology #43
- 45Animal Infrastructure: Why You’re More Than Goo: Crash Course Biology #44
- 46Animal Defense Systems: How Skin, Snot, and Cells Keep Us Healthy: Crash Course Biology #45
- 47Nervous & Endocrine Systems: What Really Happens When You Step on a Lego: Crash Course Biology #46
- 48Sexual & Asexual Reproduction: How Animals Do It: Crash Course Biology #47
- 49Gender, Sex, & Sexuality: What’s the Difference?: Crash Course Biology #48
- 50Animal Behavior: Why This Toad Is Bad at Jumping: Crash Course Biology #49
- 51Biology and You: The Dr. Sammy Show: Crash Course Biology #50