Life Processes: Nutrition, Respiration, Circulation, Excretion, and Response to Stimuli

Life processes are the essential biological processes that help living organisms to survive and function. These processes include nutrition, respiration, circulation, excretion, and response to stimuli. In this article, we will be focusing on these subtopics and their individual processes.

N nutrition is the process of acquiring food that is needed for nourishment and sustenance of the organism. There are two main modes of nutrition, autotrophic and heterotrophic. Autotrophic nutrition is present in plants, where they produce their own food by photosynthesis. In heterotrophic nutrition, animals obtain their food by ingesting other organisms or their products.

Respiration is the process of burning food to generate the energy needed for other life processes. Cellular respiration may take place in the presence or absence of oxygen. In the presence of oxygen, it is called aerobic respiration, and in the absence of oxygen, it is called anaerobic respiration.

The process of circulation is the movement of