The fluid found in the spaces between cells is called which?

The fluid found in the spaces between cells is called which?

• A. Cerebrospinal fluid
• B. Lymph
• C. Interstitial fluid
• D. Plasma

Answer: (C)

Interstitial fluid is the fluid found in the spaces between cells. It is the extracellular component that bathes tissue cells, formed from plasma filtered through capillary walls. This fluid acts as the medium for exchanging nutrients, oxygen, and wastes between blood and cells, helping to keep tissues hydrated and balanced chemically. It’s separate from cerebrospinal fluid, which cushions the brain and spinal cord, and from plasma, which remains inside blood vessels. It’s also related to lymph: when interstitial fluid drains into lymphatic vessels, it becomes lymph, but in the tissues the fluid you’re talking about is interstitial fluid itself.

Interstitial fluid is the fluid found in the spaces between cells. It is the extracellular component that bathes tissue cells, formed from plasma filtered through capillary walls. This fluid acts as the medium for exchanging nutrients, oxygen, and wastes between blood and cells, helping to keep tissues hydrated and balanced chemically. It’s separate from cerebrospinal fluid, which cushions the brain and spinal cord, and from plasma, which remains inside blood vessels. It’s also related to lymph: when interstitial fluid drains into lymphatic vessels, it becomes lymph, but in the tissues the fluid you’re talking about is interstitial fluid itself.