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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.
Explain the Structure and Functions of Liver The liver is enclosed in a thin capsule and is completely covered by a peritoneum. The liver is described as having four lobes. As
An experiment with a loop of thread Rinse a dinner plate methodically and then fill it with water. Make a loop with thread, open it a little and float it on the water. Touch th
which two body systems control movement of digestive organs?
Riboflavin Riboflavin has two major coenzyme derivatives, namely in mononucleotide (FM) which is the active component of riboflavin and is formed by the addition of a
1. What is the Solar Neutrino problem, and what are the possible resolutions of it? Which of these resolutions is now believed to be the most likely explanation? 2.What is the m
When, in the geological time scale, did dinosaurs first appear: Triassic
Where friction is desirable and undesirable at the same time.
how do the currents produced by a 1.5V flashlight cell and a 12 V car battery compare if the resistance is the same?
three steps of age hardening
Cement and concrete Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it harde
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