vävnadsvätske

Vävnadsvätska, also known as interstitial fluid, is the fluid that fills the spaces between cells in animal tissues. It is derived from blood plasma that filters out of capillaries. This fluid plays a crucial role in the transport of nutrients to cells and the removal of waste products from them.

The composition of vävnadsvätska is similar to blood plasma but contains significantly less protein because most large protein molecules are too big to pass through the capillary walls. It is essentially an extracellular fluid that bathes all the cells in the body. This fluid environment is vital for cellular function and communication.

The formation of vävnadsvätska is a dynamic process driven by hydrostatic and osmotic pressures. Blood pressure within the capillaries forces fluid out, while the concentration of solutes, particularly proteins in the plasma, draws fluid back in. The balance between these forces determines the net filtration or reabsorption of fluid.

A significant portion of the vävnadsvätska is reabsorbed directly back into the capillaries. The remainder enters the lymphatic system, where it becomes lymph. Lymphatic vessels then transport this fluid back to the bloodstream, completing the circulation and ensuring that fluid volume is maintained within the tissues and the circulatory system. Any disruption in this balance can lead to edema, or swelling, due to an accumulation of excess vävnadsvätska.