how can trees give us oxygen?
606416
Oxygen is the byproduct of photosynthesis, which means that trees create oxygen by processing sunlight, water, and carbon dioxide into the simple carbohydrates they need as "food."
699839
carries oxygen around the body
515638
Transpiration, the properties of water, and the vascular tissues help the trees to suck water from the very bottom of the roots to the top of the tree leaves. Transpiration is caused when water is sucked from the root tips of the tree and into the vascular tissue called xylem. Because two of the properties of water state that water is adhesive (they stick to stuff) and cohesive (they stick together), these water molecules stick to the xylem as well as each other, using it's bonds to pull each other up the tree. And when the stomata (the hole on the underside of the leaf) opens for gas exchange, one water molecule at a time evaporates from the leaf, thus pulling the chain up one by one. Hope that helps!
319084
For photosynthesise CO2 and sunlight required.When we breath,we discharge CO2.This CO2 can help plants for photosynthesise.Any way we producing more than million times of CO2 what plants required other than our breathing.Plants tired of this process.If you want relay help plants,reduce wastage and pollution.
1081301
Yes, during photosynthesis, plants and trees take in carbon dioxide and release oxygen into the atmosphere.  For this reason, planting trees is encouraged !
499465
A tree grows by photosynthesis: it combines carbon dioxide from the air with water, which it takes in through its roots, to produce glucose, which is converted into starch to be stored in the leaves. Minerals are also taken in through the roots which combine with glucose to produce amino acids, proteins and other stuffs that the tree needs e.g. phosphorus for DNA in the cell nucleus.\n\nThe equation for photosynthesis is:\n\n6CO2 + 6H2O -> C6H12O6 + 6O2\n\nWith research you should be able to find other equations for processes going on inside the tree.\n\nI have not described the first stages of the tree's life, i.e. germination. The increase in mass here is due to the uptake of water.
131253
Cause cells need oxygen.
844094
Absorbed from the ground into the roots of the tree-transported up the tree by capillary action all the way to the leaf- Absorbed into one of the cells on the surface of the leaf, where is travels to the surface of the leaf and evaporates, turning into a gas.  Moves about the atmosphere until it gathers with many other water gas molecules in a cloud-then at some point coalesces with other water molecules forming a liquid again, which falls to the ground.
45018
1. Remember trees need carbon dioxide and turn them to oxygen? less trees means more carbon dioxide... which means global warming (CO2 is also called the greenhouse gas.)\n2. Trees need water... less trees means more water flowing down when it rains. also, soil erosion is an issue.
94116
1. respiration is for animals, and phtosynthesis is for vegetals, bacteria and algae.\n\n2. We (animals) use respiration because our cells need a process called gas exchange ( we take Oxygen from the air and exchange it in our cells for carbon dioxide)\n\n3. This is possible for us because our cells have organs called mitocondria, while vegetal cells have chloroplasts.\n\n4.Photosynthesis is an important biochemical process in which plants, algae, and some bacteria harness the energy of sunlight to produce food. Ultimately, nearly all living things depend on energy produced from photosynthesis for their nourishment, making it vital to life on Earth. It is also responsible for producing the oxygen that makes up a large portion of the Earth's atmosphere. Organisms that produce energy through photosynthesis are called photoautotrophs. Half of all photosynthesis comes not from plants, but from bacteria and algae.\n\nResìration involves the use of developed organs such as lungs.\n\n5. Photosynthesis produces energy from sun light, while\nrespiration produces energy from the Oxygen present in pur atmospheric air.
560650
haha the answer above me is funny...what what exactly do you want to know about it? theres a lot to do with respiration...theres inspiration where the air is taken in..this is caused by a contraction of the diaphragm..thens there structures like the epiglotis, trachea, pharynx...then the oxygen goes to your lungs..where gas exchange occurs in the alveoli's...this is done by some complicated process that i dont understand really..i didnt really pay attention during this part of physiology/biology class. haha. anyway, the oxygen is picked up by the pulmonary artery and goes to the rest of the body through the aorta...uhh, i can think of anything else..hope this helps!
932165
I would say it is the leaf of a plant or the plant itself.  The leaf gives off oxygen (the waste product) during photosynthesis.\n\nOr: (I grabbed this off Wikipedia)\nphotosynthesis uses water as an electron donor which is oxidized into molecular oxygen by the absorption of a photon by the photosynthetic reaction centre.
876879
Plants do not take in Oxygen. They take in Carbon Dioxide (the main gas we exhale) and produce Oxygen.
176329
in respiration a cell turns glucose and Oxygen into waaste products CO2 and H20. That is why we breathe in oxygen and breathe out carbon dioxide. In photosynthesis a plant makes glucose and Oxygen from our waste products.
467263
your favorite fruit trees> and you will have oxygen to breathe, fruit and shadow and the energy that only a tree  can give you and of course do not forget that you can sell the fruit
875787
Well, this happened once before.  Originally the earth had a very low concentration of atmospheric oxygen and oxygen was toxic to most organisms (they were all single celled back then).  But as organisms started to develop photosynthesis, oxygen was released into the atmosphere in huge amounts causing a massive extinction.  Now most organisms need or tolerate oxygen.  I'm not sure what would happen if the %O2 was increased now......I bet that plants wouldn't like it though.
806958
Photosynthesis produces oxygen by combining CO2 and H2O to make glucose and O2. Cellular respiration (what plants do at night and what animals do) takes glucose and O2 and makes CO2 and H20. The answer is C.