Leonardo Da Vinci was one of the first people to draw detailed sketches of human anatomy. His drawings showed that he noticed networks of muscle fibers on the inside of the heart. Da Vinci thought ...

Your heart is one of the most important organs of the body. It pumps oxygenated blood to the body, helps in nutrient delivery in the body, sends oxygen-poor blood to the lungs, receives oxygen-rich ...

The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...