Power Electronics involves combination of these areas. The function of PE is to process and control the electrical energy by supplying voltage and current in a form that is optimally suited to the load.

The word biology is derived from the Greek words /bios/ meaning /life/ and /logos/ meaning /study/ and is defined as the science of life and living organisms. An organism is a living entity consisting of one cell e.g. bacteria, or several cells e.g. animals, plants and fungi.

Capsule - Some species of bacteria have a third protective covering, a capsule made up of polysaccharides (complex carbohydrates). Capsules play a number of roles, but the most important are to keep the bacterium from drying out and to protect it from phagocytosis (engulfing) by larger microorganisms.

A system is a set of an orderly grouping of interdependent components linked/put together according to a plan to achieve a specific objective. Examples include, computer system, music system etc.

This unit specifies the competencies required to demonstrate the knowledge of common diseases. It involves identifying the stages of disease development, demonstrating the knowledge of communicable diseases, non-communicable diseases and management of common diseases

This unit specifies the competencies required to lead the implementation of workplace’s safety and health program, procedures and policies/guidelines

This unit specifies the competencies required to provide first aid. It involves providing cardio- pulmonary resuscitation; managing choking, burns, scalds, trauma, nose bleeding, cuts, fractures, drowning, poisoning and snake bites. It also involves assisting patients with existing conditions such as asthma, epilepsy and diabetes

This unit specifies the competencies required to follow procedures for environmental hazard control, follow procedures for environmental pollution control, comply with workplace sustainable resource use, evaluate current practices in relation to resource usage, develop and adhere to environmental protection principles/strategies/guidelines.

This unit specifies the competencies required to demonstrate the knowledge of human anatomy and physiology. It involves demonstrating the knowledge of organization of the human body, body fluids and their functions, body tissues; membranes and their functions, body cavities, human skeletal system, major muscles of the body and their functions, body joints, circulatory system, lymphatic system, endocrine system and its functions, nervous system and its function, digestive system and its function, urinary system and its function respiratory system and its function, special senses and their functions, reproductive system and its functions.

Community home based care is defined as any HIV and related care provided to people in their homes by formal or informal caregivers.