sisekeskkondi

Sisekeskkondi refers to the internal environment of living organisms. This includes all the fluid-filled spaces within the body and the conditions that are maintained within them. The maintenance of a stable internal environment, a process known as homeostasis, is crucial for the survival of all organisms. Key aspects of the sisekeskkond include the regulation of temperature, pH, and the concentrations of various substances such as glucose, salts, and water.

The extracellular fluid, which surrounds the cells, is a major component of the sisekeskkond. This fluid includes blood plasma, lymph, and interstitial fluid. Cells rely on this external environment to obtain nutrients and oxygen and to remove waste products. Various organ systems, such as the circulatory, respiratory, excretory, and endocrine systems, work together to regulate and maintain the sisekeskkond within narrow, optimal ranges. For example, the kidneys play a vital role in regulating water and salt balance, while the lungs help control blood pH by removing carbon dioxide. Disruptions to homeostasis, caused by factors like disease or extreme environmental conditions, can have severe consequences for the organism's health. Understanding the sisekeskkond is fundamental to comprehending physiology and the mechanisms of life.