Learn How the Heart Works. Your heart is an amazing organ. It continuously pumps oxygen and nutrient-rich blood throughout your body to sustain life. This fist-sized powerhouse beats (expands and ...

Blood flows through the heart in one direction, similar to a one-way traffic system. Heart valves help control the direction of blood flow, acting like doors opening and closing with every heartbeat.

T he 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 ...

‌Arteries and veins (also called blood vessels) are tubes of muscle that your blood flows through. Arteries carry blood away from the heart to the rest of the body. Veins push blood back to your ...

Aortic stenosis is a narrowing of the aortic valve that affects how blood flows through the heart and body. While not often linked to heart valve narrowing, high and irregular blood pressure can ...

His hydraulic description of circular blood flow—out from the heart through the arteries and back to the heart through the veins—laid the groundwork for our modern models of physiological and ...

Uncontrolled or undetected high blood pressure, also called hypertension, is one of the most concerning precursors to heart problems.Because hypertension damages one's arteries and decreases the ...

This study revealed that heart muscle cells using 3-OHB as an energy source drive better blood flow, a process known as hyperemia. These findings suggest that the heart's ability to switch between ...

There are four major causes of cardiac murmurs. Valvular stenosis: If blood is forced through a tight area, turbulent blood flow ensues, as is the case in valvular stenosis.

THE flow of blood through the microvasculature is as vital to life as that through the heart and great vessels. Vasomotor control of the circulation is accomplished principally in the arteriolar ve ...

The physical forces exerted by a heart beat and the blood flow it produces trigger the formation of new blood cells, according to two studies published today (May 13) in Nature and Cell. Cluster of ...

WE have recently studied 2 patients with symptoms of cerebral ischemia in whom a reversal of blood flow through the left vertebral artery was demonstrated. ... Heart J. 62:194, 1961. Crossref. PubMed.