You remember how Dorothy, Toto, and the rest of the gang were trying to make their way to see the Wizard of Oz? That’s kind of how veins work in relation to your heart. Your heart is the wizard, and ...

Get to know the functions of your heart, blood vessels, and blood itself and how they work together to maintain your health.

When a person takes part in exercise their face can become pink due to vasodilation of the blood vessels close to the skin's surface. When the heart contracts it pushes blood into blood vessels which ...

The metabolic activity of any tissue is limited by its blood supply; the more active any organ, the more blood it needs and the more extensive its vascularization. The changes in metabolic activity ...

The renin-angiotensin-aldosterone system (RAAS), or renin-angiotensin-system (RAS) is a regulator of blood pressure and cardiovascular function. Dysregulated RAAS is implicated in high blood pressure, ...

This article discusses the autonomic nervous system, which is responsible for involuntary reactions such as heart rate, blood pressure and respiration. This is a Self-assessment article and comes with ...

When the heart contracts it pushes blood into blood vessels which creates blood pressure. A blood pressure reading consists of two values: systolic value – blood pressure while the heart is squeezing ...