Write on the role of diffusion in excretion according to CBSC textbooks
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The process of excreting ammonia is Ammonotelism. Many bony fishes,
aquatic amphibians and aquatic insects are ammonotelic in nature.
Ammonia, as it is readily soluble, is generally excreted by diffusion across
body surfaces or through gill surfaces (in fish) as ammonium ions. Kidneys
do not play any significant role in its removal. Terrestrial adaptation
necessitated the production of lesser toxic nitrogenous wastes like urea
and uric acid for conservation of water. Mammals, many terrestrial
amphibians and marine fishes mainly excrete urea and are called ureotelic
animals. Ammonia produced by metabolism is converted into urea in the
liver of these animals and released into the blood which is filtered and
excreted out by the kidneys. Some amount of urea may be retained in the
kidney matrix of some of these animals to maintain a desired osmolarity.
Reptiles, birds, land snails and insects excrete nitrogenous wastes as uric
acid in the form of pellet or paste with a minimum loss of water and are
called uricotelic animals.
aquatic amphibians and aquatic insects are ammonotelic in nature.
Ammonia, as it is readily soluble, is generally excreted by diffusion across
body surfaces or through gill surfaces (in fish) as ammonium ions. Kidneys
do not play any significant role in its removal. Terrestrial adaptation
necessitated the production of lesser toxic nitrogenous wastes like urea
and uric acid for conservation of water. Mammals, many terrestrial
amphibians and marine fishes mainly excrete urea and are called ureotelic
animals. Ammonia produced by metabolism is converted into urea in the
liver of these animals and released into the blood which is filtered and
excreted out by the kidneys. Some amount of urea may be retained in the
kidney matrix of some of these animals to maintain a desired osmolarity.
Reptiles, birds, land snails and insects excrete nitrogenous wastes as uric
acid in the form of pellet or paste with a minimum loss of water and are
called uricotelic animals.
AshiKhanna:
I am really thankful for the effort but the thing I am asking is about diffusion in excretion of the human body
The main excretory system in humans is the urinary system. The skin also acts as an organ of excretion by removing water and small amounts of urea and salts (as sweat). The urinary system includes a pair of bean-shaped kidneys located in the back of the abdominal cavity. Each day, the kidneys filter about 162 qt (180 L) of blood, enough to fill a bathtub. They remove urea, toxins, medications, and excess ions and form urine
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Answer:
As they live in an aquatic habitat, their wastes are eliminated by diffusion through the plasma membrane. ... They remove nitrogenous wastes from the body fluid and help in maintaining the water balance in the body. Invertebrates, the main organs of excretion and maintenance of water balance are the kidneys.
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