SS1 Biology Third Term: Sexually Transmitted Infections (STIs)

Introduction Sexually transmitted infections (STIs) are infections that are spread primarily through person-to-person sexual contact. There are more than 30 different sexually transmissible bacteria, viruses and parasites. The most common conditions they cause are gonorrhoea, chlamydial infection, syphilis, trichomoniasis, chancroid, genital herpes, genital warts, human immunodeficiency virus (HIV) infection and hepatitis B infection. Several, in [...]

SS2 Biology Third Term: Mechanism Of Respiratory System

Introduction There are no special respiratory organs in unicellular and aquatic organisms such as Amoeba and Paramecium. Oxygen that dissolves in water diffuses into the body while carbon dioxide goes out of the body through the entire body surface. The cell membrane acts as the respiratory surface. The concentration of oxygen in water is higher [...]

SS2 Biology Third Term: Aquatic Habitat

Topic: Aquatic Habitat Introduction Aquatic habitat is a body of water in which certain organisms live naturally. In other words, aquatic habitats are habitats or places that relates to lives in water. Organisms that live in water are called aquatic organisms. Examples of aquatic organisms are fish, crabs, toads, plants etc. Types of Aquatic Habitats [...]

SS2 BiologyThird Term: Grassland Or Savanna Habitats

Introduction A grassland or savanna is a plant community in which grass species are dominant with short but scattered trees and shrubs. The grassland or savanna lies between the forest and the deserts or arid land. Types of Grasslands There are two major types of grasslands. These are the tropical grassland (savanna) and the temperate [...]

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SS1 Biology Third Term – Functioning Ecosystem

Biology SS 1 Third Term Week 7 Topic: Functioning Ecosystem Introduction An ecosystem is a basic functioning unit in nature. It is made up of living organisms (plants and animals) and their non-living environment. The biotic or living components such as the producers and consumers interact in their environment resulting in the ecosystem being a [...]

Amazing Brain Facts every Teen should know

The brain is probably the most essential part of the human body, especially considering how it is responsible for the coordination of activities in the body; including the ability to think, feel, move and express, etc. In other words, the brain controls both our voluntary and involuntary actions including respiration, an activity that is undeniably [...]

Science Students! Here are the Basic Safety Measures to Observe While in the Labouratory

Let me begin this article by telling a rather funny but instructive story. Enjoy and learn please… First year Medical Students of Kenyatta University were attending their first Anatomy Class. As they all gathered around the Anatomy Table beholding the real dead body before them, their lecturer, Professor Mwangi started the class by telling them [...]

Biology – Reflex and Voluntary Actions

Biology, SS 3 Topic: Reflex and Voluntary Actions Reflex Action Definition: A reflex action is an involuntary or automatic action in response to impulses initiated by a stimulus. A reflex is something that your body does natural. In other words, reflex action is a rapid or quick response to stimuli which are not consciously controlled [...]

Family Health – Personal Cleanliness

Topic: Family Health (Personal Cleanliness) Introduction When we clean our body regularly, we reduce the chances of getting infected by various organisms that thrive in dirty environment. An individual’s health depends on the way and manner in which he or she takes care of himself or herself. If one does not maintain a high level [...]

Classwork Series and Exercises {Biology – SS1}: Biomes

Biology, SS 1 Topic: Biomes Introduction Large biotic communities corresponding to vegetation belts or zones are called biomes. Biomes are described as any large natural terrestrial ecosystem. The type of any biome is largely determined by climatic factors, especially rainfall and temperature. Thus, regions of the world with similar climates have similar biomes. The local [...]

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