Author: Ritsam School

Learning Objectives By the end of the lesson, students should be able to a) define disease vectors; b) mention disease vectors; c) mention the diseases caused by the vectors; d) mention the animals affected by these diseases; e) mention some of the symptoms of the diseases; f) mention how to control these diseases. Introduction Disease causing organisms are living organisms which are capable of causing disease in other living organisms. They are generally known as pathogens or vectors. Diseases can be defined as the absence of normal health due to infection, nutritional deficiency and imbalance, hereditary and functional disorders as well as injuries. Diseases can also be described as any disturbance in the normal life or body function of an...

Learning Objectives By the end of the lesson, students should be able to a) Define the earth; b) Define space; c) Define the solar system; d) Explain the formation of volcanoes; e) Explain the Rotation of the Earth; f) Define the moon; g) Define climates and seasons; h) Define shadows and eclipses; i) Define the stars. Introduction The interest of man in space has existed from ancient times when man employed the naked eyes to study and speculate on the moon, the stars, the sun, and other things which were imagined to be there in space. As time went by, man began to carry out more systematic studies of space. By the second century AD, a Greek mathematician called Ptolemy...

Objectives: a) Meaning of Drug and Drug abuse b) Sources of Drugs c) Methods of Drug Abuse d) Causes of Drug abuse e) Uses and side effects of Drugs Meaning of Drug and Drug Abuse Drug: is a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or to otherwise enhance physical or mental well-being. A drug is any substance other than food that by its chemical or physical nature can affect the structure and functions in a living organism. When drugs are administered under proper medical supervision, they can serve three objectives namely...