It is a special type of diffusion, which involves the movement of water through a semi-permeable membrane (differentially permeable membrane). The movement of molecules takes place from the region of higher concentration of water (dilute solution) to the region of lower concentration of water (stronger solution) until the equilibrium. It can also be defined as … Read more
Introduction Sterilization is an essential stage which is used in the processing of any product. These products are destined for parenteral administration, or for contact with broken skin, mucosal surfaces, or internal organs where the threat of infection exists. The sterilization of microbiological materials, soiled dressings and other contaminated items is necessary to minimize the … Read more
Introduction Epithelial tissue is one of the four basic types of animal tissues. It is a covering tissue. It forms thin sheets which cover body structures and also line the cavities of all the hollow organs of the body. It is arranged in single or multilayered sheets. It is supported and attached to underlying connective … Read more
First animals, solitary or colonial and protoplasmic grade of organization. Simple, unicellular microscopic organisms. Generally free living found in fresh water, salt water and damp soil. Some are parasitic and commensal. Body is naked or covered by pellicle, exoskeleton or internal skeleton may be present in some forms. Locomotory organs are pseudopodia, whip-like flagella and … Read more