The constituents of body fluids

1. The constituents of plasma, interstitial fluid, and intracellular fluid are identical, but the quantity of each substance varies among the compartments. The most striking differences are the low protein content in interstitial fluid compared with intracellular fluid and plasma and the fact that sodium and chloride ions are largely extracellular, whereas most of the potassium ions (approximately 90%) are intracellular. This unequal distribution of ions results in a voltage difference across cell membranes. Extracellular fluid can be divided into interstitial fluid and blood plasma. Interstitial fluid, sometimes referred to as tissue fluid, fills the spaces in between cells, it is exactly the same as blood plasma, except it does not contain proteins. When blood plasma gets pushed out of through the capillary wall it leaves the proteins behind in the blood and becomes interstitial fluid, It carries with it oxygen and nutrients.

2. One of the major roles of electrolytes is to ensure that fluid levels inside and outside the cell are balanced. The cell can adjust its fluid levels by changing the concentration of electrolytes. For example, an increase in electrolytes within the cell draws more fluid in whereas a decrease in electrolytes promotes an efflux of fluids. Sustaining this type of osmotic gradient is essential for nerve and muscle function, hydration, and maintaining blood pH levels. Additionally, electrolytes carry electrical impulses across the cell and to neighbouring cells in order to promote muscle contractions and nerve impulses.
1. The pH of the tissues and the entire body fluids affects the condition of your health. The closer the pH is always to 7.35 - 7.45, the more likely you are to stay healthy and be able to fight off disease and illness. Enzymes are vital in hundreds of reactions. If the pH moves out of range then the enzymes do not work properly and the enzymes will denature.

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4. The 5 functions of water in our body
Water can dissolve