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BIO NMDCAT Biological Importance of Water
nmdcat.online June 27, 2026

In endothermic organisms, the high water content of blood and tissues is a key factor in distributing metabolic heat uniformly because of water’s

A. Low thermal conductivity, which traps heat in specific areas
B. High specific heat, which allows it to absorb and transport heat without a large local temperature change
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C. High latent heat of vaporization, which causes heat to be released in cooler areas
D. High viscosity, which slows the circulation of heat

📝 Explanation

Blood (which is ~92% water) absorbs excess heat from metabolically active tissues (like muscle and liver) with a minimal rise in its temperature. It then circulates, distributing this heat to cooler peripheral tissues, effectively acting as a conveyor belt for thermal energy.

📖 Additional Information

  • Low thermal conductivity, which traps heat in specific areas
  • High specific heat, which allows it to absorb and transport heat without a large local temperature change
  • High latent heat of vaporization, which causes heat to be released in cooler areas
  • High viscosity, which slows the circulation of heat

Blood (which is ~92% water) absorbs excess heat from metabolically active tissues (like muscle and liver) with a minimal rise in its temperature. It then circulates, distributing this heat to cooler peripheral tissues, effectively acting as a conveyor belt for thermal energy.

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