Water. Over 90% of your body is made of water and water is also where all of the chemical reactions that keep you alive occur.
Interstitial fluid is the basic fluid from which all others are derived, including blood, lymph, and all extracellular fluid. Hormones are chemical messengers and are transported by blood, thought they themselves are not considered a body fluid.
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Perhaps it may induce edema, but in general, interstitial fluid is the basic body fluid.
Most of the body's fluid is found inside cells (intracellular fluid) and in the space surrounding cells (extracellular fluid). The extracellular fluid includes the fluid within blood vessels (intravascular) and the fluid in between cells (interstitial fluid).
Sodium is the dietary substance most responsible for the body retaining fluid. High sodium intake can lead to water retention by disrupting the balance of electrolytes and increasing the volume of fluid in the body's tissues.
It could be argued that the most basic building block of the body, as in all other things, is the atom. The answer that you are most likely looking for is the protein.
Peritoneal cavity
stomach acid/fluid.
Urine is a body fluid that can vary the most as its composition is influenced by factors such as hydration levels, diet, and overall health. Variations in urine color, odor, and volume can indicate changes or issues in the body.
Another term for body fluid is bodily fluid.
The main transport fluid in your body is your blood. This fluid is found throughout the body in great amounts.