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The extracellular fluid found in most tissues is called interstitial fluid. This fluid surrounds the cells and provides an environment for cells to exchange nutrients and wastes with the blood.
The fluid compartment that makes up the internal environment of the body is primarily composed of intracellular fluid (inside cells) and extracellular fluid (outside cells). Extracellular fluid further consists of interstitial fluid (between cells) and plasma (within blood vessels). These fluids help maintain homeostasis by transporting nutrients, wastes, and signaling molecules throughout the body.
Prostate gland secretion helps neutralize seminal fluid by providing a slightly alkaline environment, which counteracts the acidity of the vaginal environment. This alkaline pH helps to protect sperm from the acidic conditions in the female reproductive tract, promoting their survival and motility.
Tissue fluid is called the internal environment because it bathes the cells within an organism, providing them with nutrients and removing waste products. It helps to maintain a stable internal environment by ensuring that cells have access to essential substances for their survival and function.