Categories
Human Biology

Erythrocytes

Science > Biology > Human Anatomy and Physiology > Cardiovascular System > Composition of Blood: Erythrocytes When a human blood sample is prevented from clotting and spun in a test tube (centrifuged), in a machine called a centrifuge, the blood separates into a straw coloured liquid called plasma and a dark brown mass of blood […]

Categories
Human Biology

Blood Plasma

Science > Biology > Human Anatomy and Physiology > Cardiovascular System > Composition of Blood: Blood Plasma When a human blood sample is prevented from clotting and spun in a test tube (centrifuged), in a machine called a centrifuge, the blood separates into a   straw coloured liquid called plasma and a dark brown mass […]

Categories
Human Biology

The Blood

Science > Biology > Human Anatomy and Physiology > Cardiovascular System > The blood, an Overview In the Cardiovascular system, the ‘‘heart’’ (cardi) pumps the blood in a ‘‘little circle’’ (circul), which travels through ‘‘little vessels’’ (vascul). In human, the transportation is done through blood circulatory system and lymphatic system. Thus two fluids move through […]

Categories
Human Biology

Circulatory System and its Functions

Science > Biology > Human Anatomy and Physiology > Cardiovascular System > Circulatory System and its Function In living things, many substances such as food, gases, minerals salts, hormones and waste products have to be transported from one part of the body to another. Plants and animals have a system of transporting substances throughout their body. […]

Categories
Human Biology

Nutrition

Science > Biology > Digestion and absorption in Human > Nutrition Energy is required by living beings for performing different activities. Energy is contained in the food. Food can be defined as a collection of chemicals taken by an organism for the purpose of the growth, repair, and replacement of body cells, energy releases, and […]

Categories
Botany

Photosynthesis

Photosynthesis is an important activity that occurs in all green plants, whether flowering or non- flowering. It is the only process by which solar energy is converted into chemical energy.  Photosynthesis may be defined as the synthesis of carbohydrates by the green organs (containing chlorophyll) of a plant in presence of sunlight from carbon dioxide […]

Categories
Physics

Longitudinal Stress and Strain

Science > Physics > Elasticity > Longitudinal Stress and Strain In this article, we shall study the concept of stress, strain, and modulus of elasticity. Main focus will be on longitudinal stress, longitudinal strain, and Young’s modulus of elasticity. Concept of Stress: The net internal elastic force (restoring force) acting per unit area of the […]

Categories
Physics

Classification of Materials

Science > Physics > Elasticity > Classification of Materials In this article, we shall study the deformation in the body due to the application of deforming force and classification of materials on this behaviour. Effects of Applied Force on a Body: If the forces acting on a body are unbalanced i.e. the resultant force acting […]

Categories
Physics

Simple Numerical Problems on Force

Science > Physics > Force > Simple Numerical Problems on Force In this article, we shall study to solve numerical problems to calculate the magnitude of force, momentum, and change in momentum. Example – 01: The speed of a tortoise and hare are 1 m/s and 3 m/s respectively. The mass of the hare is 5 […]

Categories
Physics

Applications of Newton’s Laws

Science > Physics > Force > Applications of Newton’s Laws Newton’s laws of motion have everyday applications. The change in momentum of a body in a small time is a cause of large force. Most of the applications are related to the concept of change in momentum. Cricket fielder lowers his hand while catching a […]