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In a unicellular organism, the interior region of the organism is no longer in contact with the external environment. Thus simple processes of diffusion, phagocytosis, exocytosis and contact with sea water helped in exchanging the necessary molecules and nutrients. But a further increase in size and complexity of the organism lead to concentration of the pool of cytoplasm. The fluid in-between the cells was known as interstitialfluids.
These fluids, due to constant exchange of molecules between the various cells lead to changes in the internal environment which influenced the functioning of the cell. Physiology, we learnt earlier, is concerned with such basic activities as reproduction, growth, metabolism, excitation and contraction as they are carried out within the fine structure - the cells, tissues, organs and organ systems of the body. The various body systems of our body are enumerated next.
Importance of nutrition: We cannot live without food. Our hunger can be satisfied by any kind of meal, but to remain healthy and free of disease, our body requires certain kin
show me the slogans on good eating habits for proper digestion
Objectives While undertaking this exercise and after its completion, you should be able to: share with your peer group, the relevant information1 knowledge/opinions with regard
What is the name for the margin where two plates in the lithosphere slide past each other? Transform Fault Margins
Explain the Categories of Nerves System The nerves are divided into two systems: sympathetic and parasympathetic. They constitute the autonomic system (auto: independent from t
methods of heat transfer
Alfalfa A perennial hay crop of the highest quality.
Recycling of used resources and waste: Some of the materials once used need not go waste, these can be re-used. The process through which the waste resources are again made us
Explain Sinus Tachycardia - Electrocardiogram When the only abnormality is that the heart rate at rest is more than 100 per minute, the condition is known as sinus tachycardia.
Controlling Air Pollution: Now let us see, how air pollution can be controlled. i) Photochemical smog-eliminating this would require large scale changes in life style
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