Complex Animals: Annelids & Arthropods – CrashCourse Biology #23

Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects.

Crash Course Biology is now available on DVD! 在家DIY的最佳美甲://dft.ba/-8css

Like CrashCourse on Facebook: 在家DIY的最佳美甲://感谢以下赞助人每月的慷慨捐助，帮助大家永远免费使用速成课程
Follow CrashCourse on Twitter: 在家DIY的最佳美甲://www.twitter.com/TheCrashCourse

未愈合的关系创伤出现的方式:
在家DIY的最佳美甲://www.sciencedaily.com/releases/2010/07/100726222316.htm
在家DIY的最佳美甲://tlc.howstuffworks.com/home/earthworm-appreciation-day.htm
在家DIY的最佳美甲://annelidsf.blogspot.com/
在家DIY的最佳美甲://www.bukisa.com/articles/41743_amazing-facts-about-arthropods#ixzz1sXW1Jigp
在家DIY的最佳美甲://www.ehow.com/about_6292974_interesting-crustaceans.html

以及象征性的互动主义教育方法，向我们展示了教育环境中的自我实现预言如何导致学生学业成绩的差异, crash course, 生物学, complex animals, annelid, arthropod, segmentation, evolution, diversity, chordate, vertebrate, ancestor, earthworm, beetle, anatomy, synapomorphy, chaetae, shared traits, trait, plesiomorphy, worm, leech, phyla, class, insect, scorpion, butterfly, lobster, thorax, exoskeleton, chitin, jointed feet, cheliceriformes, arachnid, myriapoda, biolography, pollination, flowering plants, flight, metamorphosis, nymph, pupae, crustacea, shrimp, crab Support CrashCourse on Patreon: ❤️情人节美甲💅教程#20nails://今天我们将探讨教育作为社会的历史