Biology

Respiration is the process by which energy is liberated from organic compounds such as glucose. It is one of the most important characteristics of living organisms. Energy is expended (used)… Read More »MEANING AND SIGNIFICANCE OF RESPIRATION

An allergy is a hypersensitive reaction to an antigen by the body. The antibody reacts with the antigen violently. People with allergies are oversensitive to foreign materials like dust, pollen… Read More »ALLERGIC REACTIONS

A vaccine is a biological preparation designed to provide immunity against specific diseases. It contains weakened, inactive, or non-disease-causing forms of a pathogen, or fragments of it, which stimulate the… Read More »IMPORTANCE OF VACCINATION

There are four types of blood groups in human beings: A, B, AB and O. These are based on types of proteins on the cell membrane of red blood cells.… Read More »ABO BLOOD GROUPS

Immune response is the production of antibodies in response to antigens. An antigen is any foreign material or organism that is introduced into the body and causes the production of… Read More »IMMUNE RESPONSES

Composition of Blood The mammalian blood is made up of fluid medium called plasma with substances dissolved in it. Cellular components suspended in plasma include; Erythrocytes (red blood cells), Leucocytes… Read More »STRUCTURE AND FUNCTION OF BLOOD

Transpiration is the process by which plants lose water in the form of water vapour into the atmosphere. Water is lost through stomata, cuticle and lenticels. Stomatal transpiration: This accounts… Read More »TRANSPIRATION IN PLANTS AND ANIMALS

Transport is the movement of substances within an organism. All living cells require oxygen and food for various metabolic processes. These substances must be transported to the cells. Metabolic processes… Read More »INTRODUCTION TO TRANSPORTATION

rgans that are involved with feeding in humans constitute the digestive system Digestive System and Associated Glands Human digestive system starts at the mouth and ends at the anus. This is… Read More »DIGESTIVE SYSTEM AND DIGESTION IN HUMANS