Body fluids include extracellular fluid and intracellular fluid. For us, extracellular fluid is the internal environment. Tears do not belong to the internal environment, but why do they belong to the

Body fluids include extracellular fluid and intracellular fluid. For us, extracellular fluid is the internal environment. Tears do not belong to the internal environment, but why do they belong to the body? The direct environment of cells in the body is extracellular fluid, which is called internal environment.

Body fluids: The body contains a lot of water, which together with various substances dissolved in water are collectively called body fluids, accounting for about 60% of the body weight.

An inquisitive question, for which I gave you two encyclopedic definitions.

Simply put, what are tears? It is extracellular fluid before it flows out of the eyes, because it also belongs to the internal environment and body fluids when it comes into contact with cells, but it is not after it flows out of the eyes, don't you think?

Simple language contradictions have no practical significance.