Male reproductive system The testes produce sperm cells and testosterone. The sperm ducts transport sperm, glands add fluid to form […]

Importance of housing A house provides shelter, privacy, security, storage, and a place for rest and family life. A healthy […]

Importance of clothing Clothing protects the body from cold, heat, sunlight, rain, dust, and injury. It also supports modesty, cultural […]

Food hygiene Food hygiene includes the practices used to keep food safe from contamination and spoilage. Contamination may be biological, […]

Animal-cell organelles An animal cell is the smallest structural and functional unit of the body. The plasma membrane controls exchange […]

Social organisation Social organisation is the structured way in which people relate to one another and cooperate to meet shared […]

Digestive disorders Digestive disorders interfere with the normal processing, absorption, or movement of food. Examples include constipation, diarrhoea, indigestion, heartburn, […]

Enzymes Enzymes are biological catalysts. They speed up chemical reactions in living organisms without being used up. An enzyme has […]

Food and nutrients Food supplies energy, materials for growth and repair, and substances that regulate body processes. The main nutrient […]

Characteristics of fungi Fungi are organisms that lack chlorophyll and therefore do not make food by photosynthesis. Many fungi consist […]