The vascular system (scientifically known as the cardiovascular system) is an organ system that moves substances to and from cells; it can also help stabilize body temperature and pH (part of homeostasis). There are three types of circulatory systems (from simplest to most complex): no circulatory system, open circulatory system, and closed circulatory system.
In plants, it is not as vascular system but as vasuclar tissues. Vascular tissue is a complex tissue found in vascular plants. The primary components of vascular tissue are the xylem and phloem. These two tissues transport fluid and nutrients internally. There are also two meristems associated with vascular tissue: the vascular cambium and the cork cambium. All the vascular tissues within a particular plant together constitute the vascular tissue system of that plant.
The cells in differentiated vascular tissue are typically long and slender. Since the xylem and phloem function in the conduction of water, minerals, and nutrients throughout the plant, it is not surprising that their form should be similar to pipes. The individual cells of phloem are connected end-to-end, just as the sections of a pipe might be. As the plant grows, new vascular tissue differentiates in the growing tips of the plant. The new tissue is aligned with existing vascular tissue, maintaining its connection throughout the plant.
The vascular tissue in plants is arranged in long, discrete strands called vascular bundles. These bundles include both xylem and phloem, as well as supporting and protective cells. In stems and roots, the xylem typically lies closer to the interior of the stem with phloem towards the exterior of the stem. In the stems of some Asteriidae dicots, there may be phloem located inwardly from the xylem as well.
Between the xylem and phloem is a meristem called the vascular cambium. This tissue divides off cells that will be become additional xylem and phloem. This growth increases the girth of the plant, rather than its length. As long as the vascular cambium continues to produce new cells, the plant will continue to grow more stout. In trees and other plants that develop wood, the vascular cambium allows the expansion of vascular tissue that produces woody growth. Because this growth ruptures the epidermis of the stem, woody plants also have a cork cambium that develops among the phloem. The cork cambium gives rise to thickened cork cells to protect the surface of the plant and reduce water loss. Both the production of wood and the production of cork are forms of secondary growth.
In leaves, the vascular bundles are located among the spongy mesophyll. The xylem is oriented toward the adaxial surface of the leaf (usually the upper side), and phloem is oriented toward the abaxial surface of the leaf. This is why aphids are typically found on the underside of the leaves rather than on the top, since the phloem transports sugars manufactured by the plant and they are closer to the lower surface.
2006-12-22 17:29:08
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answer #1
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answered by Anonymous
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Yep Trees are essential for life here on earth. They breath in Carbon Dioxide and other Pollutants and in turn release oxygen which breath and exhale out as carbon dioxide. Also Picture them as large Storage cointainers that hold Carbon dioxide but when they are cut down or burned they release it. With the lack of trees and clearing of forests this may lead to significantly higher and lower Temperatures. Just Imagine the beggining of the Earth there was probably hardly any desert and the Sahara may have been a huge tropical Forest untill the change in temperatures and weather.
2006-12-22 14:56:21
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answer #2
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answered by Anonymous
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Trees actually have veins that carry the water from their roots to their leaves so they can do photosynthesis. It's similar to a vascular system, but not quite the same. The only other similarity I can think of is at the cellular level-- trees have similar cells to humans, but they have cell walls, a large vacuole (mainly to hold water), and cholorplasts.
2006-12-22 13:39:21
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answer #3
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answered by ~*Bubbles*~ 3
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No... both are supposed to be different, eventhough the mechanism could be similar. Tree need vascular system to carry the fluids and nutrients, while humans need the blood vessels and lymphatic system. Cheers.
2006-12-22 14:14:15
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answer #4
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answered by apollo 2
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Surely there's a relatioship between humans and trees--For instance both have sap going up to their tops. However a tree's sap falls downward periodically. But a human's sap always stays in his head.
2006-12-22 13:37:04
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answer #5
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answered by george dumdum 1
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trees use capillary action through tiny straws to draw water from the roots to the branches and leaves - but I don t know what tells them to do that. Why does a seemingly healthy tree die?
2016-05-26 14:22:43
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answer #6
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answered by Wednesday 1
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i don't think so. human is human and trees is trees. they haven't any relationship with together. although both of them must live and grow up.
2006-12-22 13:48:03
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answer #7
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answered by Pinkfloyd 1
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yes there are...........
like the carbon cycle
2006-12-22 14:04:20
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answer #8
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answered by jamaica 5
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Um, I don't think so?
2006-12-22 13:37:40
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answer #9
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answered by Shelby 3
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ahhhhhh..
No
LOL
2006-12-22 13:36:47
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answer #10
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answered by Mopar Muscle Gal 7
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