Biology News
Probing The Physiology of 'Brain Tingles' - PsychCentral.com


PsychCentral.com
In the first study of its kind to look into the physiological mechanisms of ASMR, researchers from the University of Sheffield in England discovered that those who experience the phenomenon had significantly reduced heart rates while watching ASMR ...

Beloved Texas A&M-University Corpus Christi biology professor, Wes Tunnell, dies - Corpus Christi Caller-Times


Corpus Christi Caller-Times
The scientific community is mourning the death of John “Wes” Tunnell, a marine ecologist and biologist, historian, author and early orchestrator of the Harte Research Institute for Gulf of Mexico Studies at Texas A&M University-Corpus Christi. Tunnell ...

Human Exceptionalism — An Evolutionary Dilemma - Discovery Institute


Discovery Institute
Prominent high school biology textbook author Kenneth Miller is worried about human evolution. He's worried about it, specifically, as a sticking pointing for many people when it comes to accepting the whole edifice of Darwinism. I'm sure he's right ...

Texas Heart Institute: Heart Anatomy

Houston, Texas - United States

The heart weighs between 7 and 15 ounces (200 to 425 grams) and is a little larger than the size of your fist. By the end of a long life, a person's heart may have beat (expanded and contracted) more than 3.5 billion times. In fact, each day, the average heart beats 100,000 times, pumping about 2,000 gallons (7,571 liters) of blood.

Your heart is located between your lungs in the middle of your chest, behind and slightly to the left of your breastbone (sternum). A double-layered membrane called the pericardium surrounds your heart like a sac. The outer layer of the pericardium surrounds the roots of your heart's major blood vessels and is attached by ligaments to your spinal column, diaphragm, and other parts of your body. The inner layer of the pericardium is attached to the heart muscle. A coating of fluid separates the two layers of membrane, letting the heart move as it beats, yet still be attached to your body.

Your heart has 4 chambers. The upper chambers are called the left and right atria, and the lower chambers are called the left and right ventricles. A wall of muscle called the septum separates the left and right atria and the left and right ventricles. The left ventricle is the largest and strongest chamber in your heart. The left ventricle's chamber walls are only about a half-inch thick, but they have enough force to push blood through the aortic valve and into your body.

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