
Heart | Structure, Function, Diagram, Anatomy, & Facts | Britannica
Dec 6, 2025 · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double …
Heart Disease: Symptoms, Causes & Treatment - Cleveland Clinic
Sep 19, 2025 · Heart disease can lead to a heart attack, heart failure, cardiac arrest, stroke and organ damage. Healthy habits, medicines and procedures can prevent or treat CAD and other …
Heart disease - Symptoms and causes - Mayo Clinic
Aug 13, 2024 · Coronary artery disease is a common heart condition that affects the major blood vessels that supply the heart muscle. A buildup of fats, cholesterol and other substances in …
About Heart Disease | Heart Disease | CDC
May 15, 2024 · High blood pressure, high blood cholesterol, and smoking are key risk factors. 1 out of every 5 deaths in the United States are due to heart disease. What is heart disease? …
Cardiovascular system: Function, organs, conditions, and more
May 22, 2025 · The cardiac cycle consists of two phases: systole (contraction) and diastole (relaxation). Some conditions that can affect the heart include heart attack, stroke, heart …
Cardiac | definition of cardiac by Medical dictionary
1. pertaining to the heart. 2. pertaining to the ostium cardiacum. cardiac arrest sudden and often unexpected stoppage of effective heart action.
CARDIAC Definition & Meaning - Merriam-Webster
Jan 9, 2015 · The meaning of CARDIAC is of, relating to, situated near, or acting on the heart. How to use cardiac in a sentence.
Heart Anatomy, Function, and Blood Circulation - WebMD
Aug 22, 2024 · Learn about the anatomy of the heart and how its chambers, valves, and vessels work together to maintain effective blood circulation throughout the body to sustain life.
Heart Disease | MedlinePlus
Mar 20, 2025 · Heart disease is a general term that includes many types of heart problems. It's a type of cardiovascular disease, which means heart and blood vessel disease. Heart disease is …
Cardiovascular diseases (CVDs)
Jul 31, 2025 · WHO cardiovascular diseases fact sheet providing key facts and information on risk factors, symptoms, rheumatic heart disease, treatment and prevention, WHO response.