The circulatory system is essential for the transfer of nutrients and oxygen to all cells of the body. The system consists of the heart and the blood vessels whose branches run throughout the body.

Your circulatory system works all day, every day, to pump oxygen throughout your body. There are cardiovascular conditions that can impact this system. Your circulatory system, also known as your ...

There are about 30-40 billion white blood cells present in our body to fight against infective and foreign organisms. On average, human blood circulates through the whole body every 23 seconds.