Various non-respiratory functions are also shown by respiratory tract. Not only gaseous exchange that is the primary function of it. Lungs show defense barrier and metabolic functions. It is the main organ of respiration. Some important compounds are synthesized by it. Non-respiratory functions are: a) Olfaction Provides olfactory sensation. Presence of olfactory receptors in mucus … Read more
There are a series of cells that are distributed throughout the body that have shared the property of being able to phagocytose unwanted matter entering in the body. Those unwanted matter may include bacteria and dead cells. These cells also have important role in defence mechanisms for which they work in collaboration with lymphocytes to … Read more
Introduction to Interferons Interferons are low molecular weight protein, produced by virus infected cells. These, itself induces the formation of a second protein inhibiting the transcription of viral mRNA. These are produced by the host cell in response to the virus particle, viral nucleic acid and non-viral agents. Non-viral agents include synthetic polynucleotides such as … Read more
Introduction The process of ingestion of bacteria or other material by phagocytes and amoeboid protozoans is called phagocytosis. Macrophages and neutrophils show a high capacity for the physical engulfment of particles such as microorganisms or microbial fragments from their immediate extracellular environment. There are other various cells which show this process as well. For engulfing … Read more