Osmolarity:
The concentration of a solution expressed as the total number of solute particles per liter.
The sharks’ bodies are particularly high in urea and trimethylamine N-oxide. Urea is essential for the metabolism of compounds containing Nitrogen within their bodies and tissues. It is used to carry Nitrogen out of the body in urine. Trimethylamine is a product of the decomposition of animals and plants. It smells fishy in low concentrations and like ammonia in high concentrations. This is what gives rotting fish its unbearable smell. The Urea also becomes evident after a shark has been dead for some time, giving it a smell that is quite chemical in nature. These substances assist to maintain the animal’s isotonicity.
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