The Frank-Starling law of the heart is a physiological concept that states that the force of contraction of the cardiac muscle is proportionate to its starting length. The Frank-Starling law is also known as the Frank-Starling mechanism. It is the basic principle of cardiac performance.
The Frank-Starling law of the heart was named after Otto Frank and Ernest Starling. They were the first physiologists that described the concept. They proposed that the longer the cardiac muscle is stretched, the greater the muscle contraction. This means that the heart's diastolic expansion is directly proportional to the strength of the heart's systolic contraction. When there is an increase in the diastolic expansion, the systolic contraction will also increase.Learn More
Anne Frank called her dairy "Kitty" because she wants to think of the diary as being her friend so that it will be easier to write. The diary was a gift from her parents for her 13th birthday, and she took it with her when the family went into hiding from the Nazis during World War II.Full Answer >
"The Drunkard" by Frank O'Connor is a short story narrated by Larry Delaney, a man who recollects an incident from his childhood in Ireland. Asked by his concerned mother to accompany his father, a drunkard, on a visit to a public house, Larry is the one who ends up getting drunk.Full Answer >
The short story "The Tell-Tale Heart" was written by Edgar Allen Poe. It was first published in the Boston magazine "The Pioneer" in January of 1843.Full Answer >
The European starling is native to Eurasia, but due to widespread introductions by humans, it now has a much wider range. Starlings are notoriously invasive in much of North America.Full Answer >