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The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. [3] In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the chest, called the mediastinum. [4]
Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscle tissues, the others being skeletal muscle and smooth muscle.It is an involuntary, striated muscle that constitutes the main tissue of the wall of the heart.
A heart valve is a biological one-way valve that allows blood to flow in one direction through the chambers of the heart.A mammalian heart usually has four valves. Together, the valves determine the direction of blood flow through the heart.
The House passed the "Protection of Women and Girls in Sports Act," which could change Title IX protections and ensure only people assigned female at birth participate in women and girls athletics ...
An ultra-trained athlete would have a resting heart rate of 37–38 bpm. [3] Tachycardia is a high heart rate, defined as above 100 bpm at rest. [4] Bradycardia is a low heart rate, defined as below 60 bpm at rest. When a human sleeps, a heartbeat with rates around 40–50 bpm is common and considered normal.
3 Things You Must Do When Your Savings Reach $50,000. Meet Your Money Goals: The Best Banks of 2025. 9 Things You Must Do To Grow Your Wealth in 2025.
Selena Gomez is defending her performance in the Netflix musical Emilia Pérez.. In the new film, which also stars Zoe Saldaña and Karla Sofía Gascón, Gomez, 32, portrays the former wife of a ...
Coronary artery disease (CAD), also called coronary heart disease (CHD), or ischemic heart disease (IHD), [13] is a type of heart disease involving the reduction of blood flow to the cardiac muscle due to a build-up of atheromatous plaque in the arteries of the heart.