The human heart contains two primary arteries, which are called coronary arteries. The purpose of these arteries is to transport oxygenated blood to the heart, which allows it to function effectively. The two main arteri... More »

The largest artery in the human body is the aorta, which connects directly to the heart’s left ventricle. There are no arteries inside the heart, but there are many on the exterior of the heart, called coronary arteries.... More »

According to HealthCentral, the artery that runs from the heart to supply blood to the rest of the body is the aorta. Many forces in the body cause the aorta to weaken, and as it weakens, it becomes enlarged. Enlarged ao... More »

The human heart’s rhythmic contractions are regulated by cells in the heart called pacemakers. These cells generate electrical signals that cause the heart to contract. Sometimes, these nerves fail to fire at the correct... More »

Find anatomical drawings of the human heart by referencing the seminal medical illustration book, Gray’s "Anatomy of the Human Body." There are many other medical texts and websites available that feature anatomical illu... More »

www.reference.com Science Human Anatomy Organs

The human heart is composed of four chambers: two on top, called the atria, and two on bottom called the ventricles, according to LiveScience. The atria receive deoxygenated blood from the body, and the ventricles pump o... More »

The human heart works by expanding and contracting, or beating, 100,000 times to pump about 2,000 gallons of blood each day, as reported by MedicineNet. It sustains life by pushing nutrient-rich blood and oxygen to all t... More »