What is vasodilate?

Vasodilate is when blood vessels get bigger, letting more blood flow through them.

Imagine your body is like a city, and the blood vessels are like the roads that cars (which are blood cells) drive on. When the roads are narrow, not many cars can pass at once, this is like when your blood vessels are small. But if the roads widen, more cars can go through easily, and that’s what happens during vasodilation.

Like a Hot Chocolate on a Cold Day

Think about drinking hot chocolate on a cold day. Your hands get warm because your body sends more blood to them. To do this, the blood vessels in your fingers stretch out, they vasodilate, so more blood can rush through and keep you cozy.

It’s like when you open a window on a chilly morning: you let in more warm air by making the opening bigger. Your body does something similar with its blood vessels to help it stay warm or cool down, depending on what it needs.

Take the quiz →

Examples

  1. Imagine your blood vessels are like garden hoses, when they relax, more water (or blood) can flow through them.
  2. When you run, your body uses vasodilation to send more oxygen-rich blood to your muscles.
  3. Feeling warm in the sun is partly because your skin’s blood vessels dilate to release heat.

Ask a question

See also

Discussion

Recent activity