capillaries

It is known that this characteristic formed from ancient times, helping us adapt to the environment in the long-term evolution of humanity.

Experts have explained why many people turn red after drinking some wine or a beer.

This achievement can help researchers develop larger human brains. In the future, they hope to use this brain cell to treat stroke patients.

The arteries, capillaries and veins in a person's circulatory system can reach a length of up to 100,000 km if joined together, enough to wrap around the Earth 2.5 times.