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

The property of water that makes it an effective lubricant in joints and the pleural cavity is its

A. High heat of vaporization
B. Cohesion and ability to form a thin, mobile film
✓
C. High dielectric constant
D. Tendency to expand upon freezing

📝 Explanation

Water, as a major component of synovial fluid and serous fluid, forms a cohesive, slippery film. The high cohesion of water molecules allows the fluid to resist being squeezed out from between surfaces under pressure, providing an excellent lubricating layer.

📖 Additional Information

  • High heat of vaporization
  • Cohesion and ability to form a thin, mobile film
  • High dielectric constant
  • Tendency to expand upon freezing

Water, as a major component of synovial fluid and serous fluid, forms a cohesive, slippery film. The high cohesion of water molecules allows the fluid to resist being squeezed out from between surfaces under pressure, providing an excellent lubricating layer.

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