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Paul Andersen explains how nutrients as well as water are delivered in plants. He starts with a short discussion of what nutrients are needed by plants and where they obtain them. He reveals you dermal, vascular and ground cells in monocot as well as dicot roots, stems and also leaves. He then clarifies just how water is pulled up a tree in xylem and just how sugar is pressed in a plant through phloem.
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I really enjoy your videos. I’m not in school right now, but I enjoy plants immensely and when I do get to school I want to major in plant biology or somewhere in the field of plants. Again, awesome video.
The easiest way to explain the way in which water is sucked up from the roots and to the leaves is to think of the process in reverse. At the end of the waters journey the excess water found in the air spaces inside the leaf is released through the leaves stomata into the atmosphere, this water is then replaced by water evaporated from the surface of the mesophyll cells, this process causes a transpirational pull and lowers the cells water potential, this in turn allows for the mesophyll cells to take water from neighbouring cells through the waters potential gradient. This process of water loss connects back to the tracheids (water conducting cells found within Xylem) and causes water to be taken from the Xylem, this water then travels along the tracheids into the air within the leaf following the water potential gradient. Xylem travels up the stem of the tree by the action of a water potential gradient, water moves from an area of high potential, to an area of low potential, gradually moving water up from the roots. Waters natural cohesive and adhesive properties and the small diameter of Xylem aid in its movement up the stem.
The way you explain things is so clear, and you add just a little bit of friendly humor which keeps things upbeat. you are a great teacher man, you inspire me.
Amazing video! Summed up all the concepts in this particular area perfectly! Keep doing what you are doing because it is extremely helpful.
Well said.
Thanks a million for this excellent presentation. This has been a huge help towards my RHS studies in the UK
So true. His videos are so helpful
Thank you for these videos! I use these as a review for my botany class because my professor doesn’t go into much detail
gracias mr anderson for explaining this process clearly. This and all your videos have helped me a lot to understand how impressive and necessary plants are for our lives…muchas muchas gracias!!!!
If any one deserves YouTube money, it’s this guy.
Happy teacher appreciation week! You have helped me a lot! From getting 50 to 90 percent on exams!
It took my professor two semesters to teach our class this stuff and he didn’t even get it correct. This 14 minute video is worth two full semesters of my horticulture college! Thanks for the video man!
Hi, I find this video very useful for teaching, so thank you for creating it. One of my students just pointed out that at 3 minutes 42 seconds you have your pictures of monocotyledon and dicotyledon stem cross sections the wrong way round. The monocotyledon stem is the one with the scattered vascular bundles and the dicotyledon stem is the one with the bundles arranged in a ring.
This was amazing! Thank you for a clear summary and a clear diagram for the Phloem and Xylem transportation. You explained my proffs very confusing 5 power points clear as day.
Frank Phillips … Hai frank I need guidance in filed study of horticulture . expecting Ur reply.
seriously! he does such a good job. some videos I have a harder time, but in those times khan academy has been very helpful
Amazing! So helpful and clear, thank you so much for making these videos 🙂
@Aishah wrong explanation.
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Really informative and also entertaining. Your teaching style keeps me attentive. Thank you! This has helped me in my college Plant Physiology course.
You right
Thank you Bozeman! Your videos are always so inciteful and very helpful.
Thank you so much for publishing these videos! You are helping me so much refresh my Bio knowledge 🙂
I’ve been studying chemistry and botany for around a month now, and this is the BEST video I’ve come across on plant structure and function. Many Thanks. Great stuff.
Watched your videos in AP bio and even in college, these videos are still useful!
Your videos are awesome! Thanks so much for helping us to understand science.
Yeah, thank you so much! Really appreciate how much knowledge you’ve applied in developing your rhythm and podcast design. Really well done! I’m using your videos to inspire the education behind an art project I’m working on. Thank you!
I’ve been relearning the concepts of biology after 20 years since graduating as a hobby. This guy has the best diagrams and explanations bar none.