basics of heart
0:18
YouTubeInside Us
basics of heart
(basics of heart) The cardiovascular system, also known as the circulatory system, is a body system that is responsible for pumping and distributing blood throughout the body. It is made up of the heart, blood vessels, and blood. Heart The heart is a muscular organ located in the chest that pumps blood throughout the body. It is about the size ...
15.3M viewsJan 19, 2023
Shorts
Here's exactly what happens every time your heart beats 🫀 It starts with an electrical signal from the SA node — your heart's natural pacemaker. That signal tells your atria to contract, pushing blood down into the ventricles. Then the ventricles contract (ventricular systole): 🫀 Right ventricle → pumps deoxygenated blood to the lungs 🫀 Left ventricle → pumps oxygen-rich blood to the rest of your body After that, the heart enters diastole — a brief relaxation where the chambers refill and pre
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