Capillaries are very tiny blood vessels — so small that a single red blood cell can barely fit through them. They help to connect your arteries and veins in addition to facilitating the exchange of ...

What Are the Different Types of Oral Cancer Surgery? Oral cancer surgery refers to a group of procedures with different jobs: removing cancer, rebuilding areas affected by treatment, or restoring key ...

Find out how different vaccines for the coronavirus cause your body to create antibodies that fight the virus.