What is the internal environment of a multicellular organism made up of tissue fluids that are always kept at a constant level regardless of the fluctuations in the external environment?

The internal environment of a multicellular organism is made up of tissue fluids that are always kept at a constant level regardless of the fluctuations in the external environment. This stable internal environment is known as homeostasis, and it is maintained through various physiological processes such as temperature regulation, pH balance, and nutrient levels. Homeostasis is essential for the proper functioning of cells and organs within the organism, and any disruptions to this balance can lead to disease or dysfunction.

Homeostasis