A very small blood vessel connecting arteries and veins, forming a network throughout the body.
From the latin word 'capillaris' meaning 'of hair'.
- The capillaries played a crucial role in the exchange of oxygen and nutrients between the body and its cells.
- The capillaries were so small that they could only be seen under a microscope.
- The capillaries were easily damaged, leading to bruising and other internal bleeding.
- The capillaries were an important part of the cardiovascular system, transporting blood and nutrients throughout the body.
- The capillaries in the fingertips were important in regulating temperature, allowing blood flow to increase or decrease as needed.