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Respiration refers the process where by food substance broken down in oder to produce energy in the body.Respiration process take place in the body cell of living organisms where oxygen burt food substance to release energy. The main factors that affects the rate of respiration are:

(a) Temperature: Respiration is controlled enzyme; the functioning of enzyme is affected by temperature the rate of respiration is low at low temperature, the rate increases with increase in temperature until the optimum temperature. Optimum temperature is the temperature at which the enzyme works best. If the temperature is raised above the optimum temperature the enzyme are denatured and the rate of respiration reduced.

(b) Activity: When an organism is involved in vigorous activity it require more energy than when at rest. Therefore the rate of respiration changes to suit the needs of the organism physical activity

(c) Size: Small organismloss heat faster than big organism this is due to small organisim have large surface area to volume ratio.therefore small organism need to respire faster than large organism to replace the energy lost through the heat

(d) Age: Generally young organism require faster than older organism this is due to yonu prganism need energy to grow also young organism are more ative than ol organism

(e) Health: If the people are sick the rate of respiration increase so as to remove toxic materials produced by pathogen in our bodies.

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