Xylem

Vascular Plants = Winning! - Crash Course Biology #37

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• published: 08 Oct 2012
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Hank introduces us to one of the most diverse and important families in the tree of life - the vascular plants. These plants have found tremendous success and the their secret is also their defining trait: conductive tissues that can take food and water from one part of a plant to another part. Though it sounds simple, the ability to move nutrients and water from one part of an organism to another was a evolutionary breakthrough for vascular plants, allowing them to grow exponentially larger, store food for lean times, and develop features that allowed them to spread farther and faster. Plants dominated the earth long before animals even showed up, and even today hold the world records for the largest, most massive, and oldest organisms on the planet. Crash Course Biology is now available on DVD! http://dft.ba/-8bCC Like CrashCourse @ http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse @ http://www.twitter.com/TheCrashCourse Table of Contents 1) 3 Tissue Types 02:37 2) Primary Growth 03:04 3) Secondary Growth 03:28 4) Dermal Tissue 04:47 a) Epidermis 04:54 5) Parenchyma Cells 05:39 6) Vascular Tissue 05:58 7) Xylem 05:58 8) Collenchyma 07:10 9) Sclerenchyma 07:35 10) Ground Tissue 08:25 a) Mesophyll 08:17 b) Photosynthesis 08:47 11) Phloem 09:54 References http://www.uic.edu/classes/bios/bios100/lecturesf04am/lect17.htm http://www.deseretnews.com/article/700071982/Central-Utahs-Pando-worlds-largest-living-thing-is-threatened-scientists-say.html?pg=all http://www.popsci.com/science/article/2012-02/200000-year-old-patch-seagrass-worlds-oldest-living-organism crashcourse, biology, vascular plant, plant, successful, diversity, diverse, conductive tissue, evolution, growth, largest, most massive, oldest, dermal tissue, vascular tissue, ground tissue, photosynthesis, sprout, germination, primary growth, herbaceous, secondary growth, woody tissue, organ, root, stem, meristem, leaf, epidermis, cuticle, trichomes, root hairs, parenchyma, cortex, xylem, evapotranspiration, collenchyma, sclerenchyma, lignin, mesophyll, chloroplasts, stomata, phloem, sieve cells, sieve-tube elements, internal pressure, diffusion Support CrashCourse on Subbable: http://subbable.com/crashcourse