👉 In the field of biology, a capillary is a type of cell membrane that serves as an insulating layer between two adjacent cells. It is responsible for allowing gases to pass through while preventing water and solutes from entering. Capillaries are typically found in small vessels like blood vessels, but they can also be present in larger organs like the heart or brain. In terms of a capillary, it's important to note that capillaries are not a specific type of cell membrane. Instead