profile/7350IMG_20200427_212430.jpg
Justin
Excretion
~0.4 mins read
Excretion is the process by which waste products of metabolism are removed from the body of living things. Waste products from metabolic activities are always produced by the body and their removal are carried out by special Excretory systems or organs. However, election and secretion should never be confused with Excretion.
Importance.
1.the Excretory products are harmful to the body so must be removed.
2.some are poisonous and never be allowed to accumulate within the body.
3.excretion helps to maintain water balance in the body.
4.Excretion also helps to maintain salt balance.
profile/7350IMG_20200427_212430.jpg
Justin
Beam Of Light
~0.4 mins read
This is the collection of rays of light.
Types;
1 . converging beam:they are produced from a large source and meet at a point forming convergent beam. It does not require a device. Example includes sunlight.
2. Diverging beam:they are produced from a small source and are scattered, that is they emerge from a source and diffuse in different directions. It requires a device. Example includes torchlight.
3.parallel beam:these are rays of light produced in a straight line. Example includes ray box.
Advertisement
Link socials
Matches
Loading...