From a tiny sample of tissue no larger than a grain of sand, scientists have come within reach of a goal once thought ...

The aorta is the largest blood vessel in the body, carrying oxygen-rich blood from the heart to every organ and tissue. It begins at the left ventricle, extends upward through the chest to form an ...

In addition to lower heart rate variability, the researchers observed a predominance of the sympathetic nervous system over the parasympathetic nervous system in volunteers infected with SARS-CoV-2.

Researchers have discovered that mRNA-based COVID-19 vaccines have a persistent effect on the innate immune system. These mechanisms may help the human body to better protect itself against ...

In addition to causing several types of cancer, human papillomavirus (HPV) appears to bring a significantly increased risk of heart disease and coronary artery disease, according to a new study.

The circulatory system consists of one heart, five liters of blood, and approximately 96,000 kilometers of blood vessels, responsible for transporting nutrients and waste throughout the body.