Introduction
All living organisms have certain common characteristics such as breathing,
growing, requiring nutrition, producing offspring, responding to stimuli, etc. that
distinguish them from non-living things. There are certain vital processes that
maintain homeostasis and proper functioning of the body, they are called life
processes. These processes continue to occur even when we are sleeping or not
performing any action. These processes are essential for all living organisms
including plants and animals. These life processes are nutrition, photosynthesis,
transportation, metabolism, respiration, reproduction and excretion. In this chapter,
we will learn about the details of these processes occurring in plants, animals and
human beings in particular.
Life
Earth happens to be the only known planet having a life. There are
beings who live, die and become part of nature again. The living
organism can be differentiated from the inanimate entities on various
parameters of life processes.
, Life Process
• The maintenance of living organisms is essential even
if they are moving, resting or even sleeping.
• The processes which together perform the function
of maintenance of 'life' are called as life processes.
• Nutrition, respiration, circulation, and excretion are
examples of essential life processes.
• In unicellular organisms, all these processes are
carried out by a single cell.
• In multicellular organisms, well-developed systems are
present to carry out the processes.
All living organisms have certain common characteristics such as breathing,
growing, requiring nutrition, producing offspring, responding to stimuli, etc. that
distinguish them from non-living things. There are certain vital processes that
maintain homeostasis and proper functioning of the body, they are called life
processes. These processes continue to occur even when we are sleeping or not
performing any action. These processes are essential for all living organisms
including plants and animals. These life processes are nutrition, photosynthesis,
transportation, metabolism, respiration, reproduction and excretion. In this chapter,
we will learn about the details of these processes occurring in plants, animals and
human beings in particular.
Life
Earth happens to be the only known planet having a life. There are
beings who live, die and become part of nature again. The living
organism can be differentiated from the inanimate entities on various
parameters of life processes.
, Life Process
• The maintenance of living organisms is essential even
if they are moving, resting or even sleeping.
• The processes which together perform the function
of maintenance of 'life' are called as life processes.
• Nutrition, respiration, circulation, and excretion are
examples of essential life processes.
• In unicellular organisms, all these processes are
carried out by a single cell.
• In multicellular organisms, well-developed systems are
present to carry out the processes.
