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 PLANTS

Venus's FlytrapMeat Eating Plants?!
Well, insect-eating anyway. These plants are usually found were soil lacks an adequate supply of important minerals like nitrogen. These plants have adapted over time so that they can obtain nutrients by trapping and digesting insects within their leaves, they also manufacture food by the more standard means of photosynthesis. Insect-eating plants include the pitcher plants and the sundews.



California PitcherplantPitcher plants have tube-shaped leaves that collect rain water in which the unsuspecting insects are drown. A sweet nectar secreted around the rim of each tube on the pitcher plant attracts insects. When the insect enters the tube, tiny, stiff hairs pointing downward prevent it from escaping and eventually force the exhausted insect into the water. The plant then digests the insect by means of an enzyme secreted by glands located in the leaves.

Sundew plants grow hairs on their leaves that produce a sticky substance that contains digestive juices. When an insect gets stuck on this substance, the hairs wrap around it or the leaves close. More fluid then covers and suffocates the insect which is then digested by the plant.

Venus's-flytrap is probably the most recognizable of all sundew plants. It has hinged leaves that close and trap insects venturing into the open trap. The inside of each leaf has tiny hairs, and the rim is edged with long interlocking, stiff bristles. The closing of the trap is triggered by any pressure applied to six hairs, three on either side of the traps lobes. After the plant has captured the insect, a sap is secreted and digestion begins, which can take up to ten days. After the insect is digested the trap opens again to await the next victim. The trap will usually die once three or four insects are digested.

There are about 400 known species of carnivorous plants covering a vast array of sizes and shapes. Most of these plants are the previously mentioned green plants we are familiar with, however, some microscopic fungi also practice this behavior of capturing and digesting prey.

Carnivorous plants digest their prey through a process of chemical breakdown analogous to the digestion process we know in animals. Once broken down by the digestion process, the nitrogen-rich animal proteins and salts are absorbed by the plants. This adaptation allows the plant to survive in environmental conditions which otherwise would be considered marginally inhabitable. The carnivorous habit expands the nutritional intake gained from the plant's environment and from photosynthesis.




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