The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is ...

This heart anatomy diagram shows that blood flows from the right atrium into the right ventricle and out to the lungs (via the pulmonary artery) where it gets oxygen.

A basic review of the anatomy, physiology and personal protective equipment related to the respiratory system.

The five vital organs in the human body are the brain, heart, lungs, kidneys, and liver. Other organs include the gallbladder, pancreas, and stomach. Organ systems, such as the nervous system ...

Blood travels from the heart, to the lungs, and back to the heart. ... Any part of the heart-lung blood circuit can become damaged or blocked, leading to pulmonary vascular disease.

Right ventricular hypertrophy is the thickening of the walls in the right ventricle of the heart. The condition can increase the risk of heart failure in some people. This MNT Knowledge Center ...

When developing longevity is your priority over one-rep maxes and timed-run events, consider the three most important “organs” on which to focus your training: heart, lungs and legs.

The semilunar valves stop the back flow of blood into the heart. There is a semilunar valve where the aorta leaves the left ventricle and another where the pulmonary artery leaves the right ventricle.