BLOOD AND HAEMOPOIETIC SYSTEM The system of organs and tissues, including the bone marrow, spleen, thymus and lymph nodes, involved in the production of cellular blood components is known as haematopoietic system. Blood is a connective tissue that plays a…
JOINTS (ARTICULATIONS) The site where more than two bones meet to carry out the movement is known as a joint or articulation. There are movable and non-movable joints in the body. Only the movable joints allow different kinds of movements.…
HUMAN SKELETON (OSSEOUS SYSTEM) A skeleton is a framework of joined bones that forms the supporting structure of the body. It helps to stand straight, to move, to perform any physical activity and also aids in breathing. The skeletal system…
TISSUES OF HUMAN BODY Tissues are a group of cells having similar structure and function. The study of tissues is known as histology. Tissues are organised to form various body organs like heart, kidneys, lungs, etc. The body is composed…
CELL: STRUCTURE AND FUNCTION Cell is the basic structural and functional unit of all living organisms. All the living organisms can be categorised into unicellular (e.g., protozoa, yeast, and bacteria) or multicellular organisms (e.g., plants and humans). A human body…
EXTRACTION The process of separating medicinally active constituents of plant and animal tissues by using selective solvents and standard procedures is termed extraction. The extracted products of plant tissues obtained in liquid or semisolid state (after removing the solvent) or…
DRYING The process in which water and other solvents are removed from a substance by applying heat is called drying. Removal of liquid from solids can be done either mechanically (using filter press or centrifuge) or thermally (by vaporisation). OBJECTIVES…
FILTRATION The process in which a heterogeneous mixture of a fluid and solid particles are separated by a filter medium which permits the passage of fluid but retains the solid particles is termed as filtration. The suspension of solid or…
MIXING Mixing may be defined as the process in which two or more ingredients are treated so that every particle of any one ingredient lies as near as possible to the particle of the other ingredient. There are several factors…
SIZE SEPARATION A unit process used to separate or categorise the particles on the basis of differences between the physical properties of the particles, like density, shape, and size is termed as size separation (or screening or sifting or classifying).…