The phenomenon of parasitism exists in various groups of the class Crustacea like Copepoda, Branchiura, Cirripedia, Isopoda and Amphipoda.

All living things obtain the energy they need by metabolizing energy-rich compounds, such as carbohydrates and fats. In the majority of organisms, this metaboli

Olfactory system, the bodily structures that serve the sense of smell. The system consists of the nose and the nasal cavities, which in their upper parts support the olfactory mucous membrane for the perception of smell and in their lower parts act as respiratory…

Dive deep into the world of sight, sound, and sensation with our guide on special senses anatomy and physiology. For the curious nursing student, this is your passport to the wondrous gateways through which we perceive our universe.

Environmental events, both physical and emotional, can produce stress reactions to widely varying degrees. Stress can affect many aspects of physiology, and levels of stress, emotional status, and means of coping with stress can influence health and disease.…

Entropy always wins. Each multicellular organism, using energy from the sun, is able to develop and maintain its identity for only so long. Then deterioration prevails over synthesis, and the organism ages. Aging can be defined as the time-related deterioration…

Aging is a continuous process over time that is mainly related to natural alterations in mechanical–biological processes. This phenomenon is due to several factors, including the time and ene...