freshwater protozoans excrete ammonia and mineral salts by means of

Minerals - Minerals occurring in the living cells form components of various inorganic and organic substances. About 20 different elements form the essential nutrients for the cells. Minerals in the living system occur in two forms (i) compounds or (ii) ions. Mine..

Removes nitrogenous metabolic wastes like urea, uric acid, creatinine, ammonia and hippuric acid Removes excess salts like sodium, potassium and vitamins Removes bile pigments Removes excess wate..

>Two important resources of ammonia are ammonium salts and ammoniacal liquor obtained by the destructive destruction of coal . Ammonia and ammonium compounds are highly soluble in water and do not occur as minerals in large quantities. The NH 3..

. The human urine contains urea, water, other nitrogenous waste products sodium chloride, mineral salts, some non-nitrogenous organic substances. The urine is primarily formed by the filtration of a protein - free filtrate from the blood of glomerular capillaries into the Bowman..

Amoeba is a protozoan which forms the simplest of all groups in the animal kingdom. Inspite of being unicellular it is physiologically balanced and performs all the essential processes of an animal. Carbon dioxide, urea, uric acid and mineral salts are not allowed to c..

. This provides easy transport for new feeding grounds and also food pieces falling from the sharks prey, to Echenei..

Adrenal cortex is a small organ. The hormones of adrenal cortex are Adreno corticosteroids. a) Minerals Corticoids, made by different cells in the adrenal cortex are concerned with water salt balance in the body. They regulate NaCl content of blood and cause excretion..

: Rhizobium, a nitrogen fixing bacteria present in the roots of leguminous plants, fixes atmospheric nitrogen to the soil. Azotobacter and Clostridium are other free-living nitrogen fixing bacteria. Physical fixation When nitrogen fixation is brought about by physical process it is called physical ..

The functions performed by the circulatory system in all animals are 1) Transport of nutrients like glucose, amino acids, vitamins, minerals 2) Transport of oxygen from the organs of respiration to the body cells. 3) Transport of carbon dioxide from the body cells to the exterio..

Water is an important part of our diet. It constitutes 70% of the body weight. The quantity of water required by the body depends upon the age, type of work and climate. A lot of water comes from the food we eat. Eg. Fruits, vegetables. However most of the water needed by our body comes from plain ..