Basis of Classification of Animal Kingdom, Biological Classification

In spite of differences in structure and form of different animals, there are fundamental features common to various individuals in relation to the arrangement of cells, body symmetry, nature of coelom. patterns of digestive, circulatory, or reproductive systems. These features are used as the Basis of Classification of Animal Kingdom and some of them are … Read more

What is Blood Plasma, Human Blood Constituents

What is Blood Plasma As many people ask What is Blood Plasma So here is the answer of this question. Blood is a special connective tissue consisting of a fluid matrix, plasma, and formed elements. Plasma is a straw-colored, viscous fluid constituting nearly 55 percent o the blood, 90-92 percent of plasma is water and … Read more

DNA Double Helix Structure

DNA is a long polymer of deoxyribonucleotides. The length of DNA usually defined as number of nucleotides (or a pair of nucleotide referred to as base pairs) present in it. This also is the characteristic of an organism For example, a bacteriophage is known as x174 has 5386 nucleotides Bacteriophage lambda has 48502 base pairs … Read more

Digestive System

Food is one of the basic requirements of all living organisms. The major components of our food are carbohydrates, proteins, and fats. Vitamins and minerals are also required in small quantities. Food provides energy and organic materials for the growth and repair of tissues. The water we take in plays an important role in metabolic … Read more

Human Diseases

Human Diseases Disease means any abnormality with our body parts or whole of the body it may be genetic, accidental or many other factors are responsible for any malfunctioning or disease. Human diseases are of many types like bacterial, viral, protozoan, allergic, by birth or genetic or may be accidental which happened by any kind … Read more

Excretory System

Excretory System In humans, the excretory system consists of a pair of kidneys, one pair of ureters, a urinary bladder, and a urethra. Kidneys are reddish-brown, bean-shaped structures situated between the levels of last thoracic and third lumbar vertebra close to the dorsal inner wall of the abdominal cavity. Each kidney of an adult human … Read more

Skeletal System

Human Muscles Cells of the human body exhibit three main types of movements, namely amoeboid, ciliary and muscular. Some specialized cells in our body like macrophages and leucocytes in blood exhibit amoeboid movement. It is affected by pseudopodia formed by the streaming of protoplasm (as in Amoeba). Cytoskeletal elements like microfilaments are also involved in … Read more

Transportation in Plants

Diffusion Movement by diffusion is passive and may be from one part of the cell to the other, or from cell to cell, or over short distances, say, from the inter-cellular spaces of the leaf to the outside. No energy expenditure takes place. In diffusion, molecules move in a random fashion, the net result belongs … Read more

Microbes in Household Products

You would be surprised to know that we use microbes or products derived from them every day. A common example is a production of from milk. Micro-organisms such as Lactobacillus and others derived commonly called lactic acid bacteria (LAB) grow in milk and convert it curd During growth, the LAB produce acids that coagulate and … Read more

Human Ear

Human Ear The human ears perform two sensory functions, hearing and maintenance of body balance. Anatomically, the ear can be divided into three major sections called the outer ear, the middle ear and the inner ear outer ear consists of the pinna and external auditory meatus (canal). The pinna collects the vibrations in the air … Read more