Physiology is the study of functioning of organs and organ systems. All physiological activities are aimed at maintenance of homeostasis, living and reproduction. Homeostasis differentiates a living being from the non-living world. It provides the uniqueness for a self- duplicating, genomicized groups of organisms. Homeostatic mechanisms involve stabilizing an optimum level of water, minerals and other components of the body fluids and other thermal regulations. It is achieved by several bio-physical, bio-chemical processes, hormonal secretions and related metabolic modifications.
The phenomenon of living is made possible due to several types of evolved organs and their well co-ordinated functions. The functioning of heart as a pumping organ being emotionally controlled is astonishing. The oxygen association and dissociation capabilities of blood pigments, cascading effects of minimal amount of hormones at molecular limits, the process of nervous conduction, analyzing and memory maintaining capacities of the brain, the holistic visual perception of the eye are all wonderful inventions of nature towards a simple process of living
The attainment of a simplified process of sexual reproduction for a complicated, genetically oriented mechanisms for sex cells production and procreation is stunningly marvellous. The orientation of reproductive strategies towards social, environmental and futuristic motives is highly precise and purposeful.
What is nutrition
The survival of all living organisms is due to several types of nutritive processes. The process of nutrition involves ingestion digestion, absorption and assimilation of food materials. The composition of nutrients vary in different types of feeding. However, for all living organisms, the nutrient comprises the following organic and inorganic components. They are carbohydrates, proteins, lipids, vitamins, minerals and water. Each component has a specific functional role. A well proportioned intake of nutrients depends on several factors such as stage of growth, sex, health condition, bodily activities and environmental situations.