Oxygen
Main source of oxygen are the plants which evolve oxygen as a by-product of photosynthesis. It is used chiefly by most of the living organisms in their aerobic respiration except certain anaerobics. Oxygen acts as a limiting factor in the distribution of animalsh..
Uses of Oxygen
For respiration All air breathing animals and plants use oxygen present in air by the process of respiration. This is known as aerobic respiration. During respiration, food is burnt in living cells by using oxygen to release energy for all metabolic activi..
Oxygen transport
Most of the oxygen is transported in a combined state. Some of the oxygen is present in solution in the blood. For each decilitre of blood, 4.6ml oxygen enters the blood in the lungs. Of this only 0.17ml remains in the plasma in the solution form. Remaining enters the..
Most of the oxygen is transported in a combined state. Some of the oxygen is present in solution in the blood. For each decilitre of blood, 4.6ml oxygen enters the blood in the lungs. Of this only 0.17ml remains in the plasma in the solution form. Remaining enters the..Oxygen
Oxygen - Oxygen is very essential for the existence of human life on Earth. It is the most abundant element on the surface of the Earth. In a free state, it is present in the Earth's atmosphere to an extent of about 21% by volume, (23.15% by mass) In the combined form, it consti..
Oxygen
In the dormant condition the seeds respiratory rate is very low and so oxygen is required in very small quantities. But for germination, oxygen is needed in large quantities. The seeds obtain this oxygen from the air contained in the soil. Seeds sown deeply in soil, fa..
Oxygen
Small quantity of oxygen is required for optimum photosynthetic electron transpor..
With oxygen
It undergoes spontaneous combustion in air due to strong affinity of boron with oxygen forming boric anhydride...
It undergoes spontaneous combustion in air due to strong affinity of boron with oxygen forming boric anhydride...
Physical Properties of Oxygen
. Although the solubility of oxygen in water is only 4% at STP, it is enough for fish and other aquatic animals and plants to breathe. Remember : STP = Standard temperature and pressure. Temperature = 0 o C Pressure = 76 cm or 760 mm of mercur..
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