👉 The fluid in a hand, often referred to as the "fluid film," is a thin layer of water that forms between the skin and the underlying tissues, such as tendons and bones, during movement. This film reduces friction between these surfaces, allowing for smooth and efficient motion. It's particularly crucial in joints like the wrist and fingers, where it prevents direct contact between moving parts, thus minimizing wear and tear. The fluid film's viscosity and the body's ability to maintain it are essential for maintaining dexterity and preventing injuries, making it a vital component of the hand's functional anatomy.
